Mathematics Is Fun

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Jan 18, 2014

Wolfram Mathematica Tutorials

  1. [PDF]

    Mathematica Tutorial: Core Language - Wolfram Research

    www.wolfram.com/learningcenter/tutorialcollection/.../CoreLanguage.pd...‎


    Wolfram Mathematica® Tutorial Collection. CORE LANGUAGE. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest updates and corrections ...
  2. [PDF]

    Mathematica Tutorial: Notebooks And Documents - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../NotebooksAndDocuments.pdf‎


    For use with Wolfram Mathematica® 7.0 and later. For the latest updates and corrections to this manual: visit reference.wolfram.com. For information on ...
  3. [PDF]

    Mathematica Tutorial: DatabaseLink User Guide - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../DatabaseLinkUserGuide.pdf‎



    For use with Wolfram Mathematica® 7.0 and later. For the latest updates and corrections to this manual: visit reference.wolfram.com. For information on ...
  4. [PDF]

    Mathematica Tutorial: Advanced Algebra - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../AdvancedAlgebra.pdf‎


    In all the tutorials for complex polynomial system solving, assume that the system has been transformed to this form. Reduce can solve arbitrary complex ...
  5. [PDF]

    Mathematica Tutorial: Advanced String Patterns - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../AdvancedStringPatterns.pdf‎



    Wolfram Mathematica® Tutorial Collection. ADVANCED STRING PATTERNS. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest updates ...
  6. [PDF]

    Mathematica Tutorial: Visualization And Graphics - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../VisualizationAndGraphics.pdf‎



    Wolfram Mathematica Tutorial Collection. VISUALIZATION AND GRAPHICS. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest updates ...
  7. [PDF]

    Mathematica Tutorial: Graph Drawing - Wolfram Research

    www.wolfram.com/learningcenter/tutorialcollection/.../GraphDrawing.pd...‎



    Wolfram Mathematica® Tutorial Collection. GRAPH DRAWING. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest updates and corrections ...
  8. [PDF]

    Mathematica Tutorial: Constrained Optimization - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../ConstrainedOptimization.pdf‎



    Wolfram Mathematica® Tutorial Collection. CONSTRAINED OPTIMIZATION. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest updates ...
  9. [PDF]

    Mathematica Tutorial: Mathematics And Algorithms - Wolfram ...

    www.wolfram.com/.../tutorialcollection/.../MathematicsAndAlgorithms.p...‎


    Wolfram Mathematica® Tutorial Collection. MATHEMATICS AND ALGORITHMS. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest ...
  10. [PDF]

    Mathematica Tutorial: Advanced Numerical Integration In Mathematica

    www.wolfram.com/.../tutorialcollection/.../AdvancedNumericalIntegratio...‎


    Wolfram Mathematica® Tutorial Collection. ADVANCED NUMERICAL. INTEGRATION IN MATHEMATICA. Page 2. For use with Wolfram Mathematica® 7.0 and ...
  11. [PDF]

    Mathematica Tutorial: Grids Rows And Columns In Mathematica

    www.wolfram.com/.../tutorialcollection/.../GridsRowsAndColumnsInMat...‎



    Wolfram Mathematica® Tutorial Collection. GRIDS, ROWS, AND .... Grid, Column, and Row form the first family, referred to in this tutorial as the Grid family. The.
  12. [PDF]

    Mathematica Tutorial: Differential Equation Solving With DSolve

    www.wolfram.com/.../tutorialcollection/.../DifferentialEquationSolvingW...‎



    For use with Wolfram Mathematica® 7.0 and later. For the latest updates and corrections to this manual: visit reference.wolfram.com. For information on ...
  13. [PDF]

    Mathematica Tutorial: Advanced Numerical Differential Equation ...

    www.wolfram.com/.../tutorialcollection/.../AdvancedNumericalDifferenti...‎


    Wolfram Mathematica® Tutorial Collection. ADVANCED NUMERICAL DIFFERENTIAL. EQUATION SOLVING IN MATHEMATICA ...
  14. [PDF]

    Mathematica Tutorial: Random Number Generation - Wolfram ...

    www.wolfram.com/.../tutorialcollection/.../RandomNumberGeneration.p...‎



    Wolfram Mathematica® Tutorial Collection. RANDOM NUMBER GENERATION. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest updates ...
  15. [PDF]

    Mathematica Tutorial: Data Manipulation - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../DataManipulation.pdf‎



    Mar 31, 2006 - Wolfram Mathematica® Tutorial Collection. DATA MANIPULATION. Page 2. For use with Wolfram Mathematica® 7.0 and later. For the latest ...
  16. [PDF]

    Download Free PDF - Wolfram Research

    www.wolfram.com/.../tutorialcollection/.../NETLinkUserGuide.pdf‎



    Wolfram Mathematica® Tutorial Collection .NET/LINK™ ..... The LoadNETAssembly function, described later in this tutorial, is the Mathematica func- tion you use ...
  17. [PDF]

    J/LINK™ USER GUIDE - Wolfram Research

    www.wolfram.com/learningcenter/tutorialcollection/.../JLinkUserGuide.p...‎


    Wolfram Mathematica®Tutorial Collection. J/LINK™ USER GUIDE ...... used exclusively in this tutorial. When you call methods or fields and get results back, ...
  18. [PDF]

    Installation Instructions

    www.wolfram.com/products/applications/.../ReadMe_Geometrica.pdf‎



    You can get familiar with Geometrica by browsing the tutorials. 6. To load the Geometrica palette of functions, go to "Palette" menu. Choose "Install a palette".
  19. [PDF]

    Mathematica Tutorial: Systems Interfaces And Deployment - Wolfram ...

    www.wolfram.com/.../tutorialcollection/.../SystemsInterfacesAndDeploy...‎



    Dec 15, 2006 - Wolfram Mathematica® Tutorial Collection. SYSTEMS INTERFACES. AND DEPLOYMENT. Page 2. For use with Wolfram Mathematica® 7.0 ...
  20. [PDF]

    Geometry Expressions Manual

    www.wolfram.com/products/applications/.../manual.pdf‎



    ... expression. After you've read about the basic ideas underlying Geometry Expressions, try running the Geometry Expressions Tutorials to help you get started.
  21. [PDF]

    Download Product Manual - Wolfram Research

    www.wolfram.com/products/applications/acegen/AceGenManual.pdf‎


    AceGen Tutorials. AceGen Preface. AceGen. © Prof. Dr.Joże Korelc, 2006, 2007, 2008, 2009, 2010. Ravnikova 4, SI - 1000, Ljubljana, Slovenia. E–mail ...
  22. [PDF]

    Presentation Schedule - Wolfram Research

    www.wolfram.com/news/events/userconf2009/UC09_Schedule.pdf‎


    Oct 22, 2009 - Hands-on Start with Mathematica Tutorial. Kelvin Mischo, Wolfram Education Group. Modeling Long-Term Care Insurance. Seth Chandler.
  23. [PDF]

    Mathematica® Link for LabVIEW® - Wolfram Research

    www.wolfram.com/products/applications/labview/manual.pdf‎


    The MathLink directory contains the VI libraries MLStart.llb and Tutorial.llb .... installed, you can access the tutorials from the AddOns section of the. Mathematica ...
  24. [PDF]

    Download Product Manual - Wolfram Research

    www.wolfram.com/products/applications/acefem/AceFEMManual.pdf‎


    AceFEM Tutorials. AceFEM Preface. AceFEM. © Prof. Dr.Joże Korelc, 2006, 2007, 2008, 2009, 2010. Ravnikova 4, SI - 1000, Ljubljana, Slovenia. E–mail ...
  25. [PDF]

    What Is webMathematica? - Wolfram Research

    www.wolfram.com/products/webmathematica/resources/userguide.pdf‎


    mathematica/WebServices/tutorial/Overview.html) to call the website and use its .....reference.wolfram.com/mathematica/DatabaseLink/tutorial/Overview.html).
  26. [PDF]

    ÌË ÈÖÓÈ - Wolfram Research

    www.wolfram.com/products/applications/tsipropac/manual.pdf‎


    The ProPac cD contains a set of tutorial and application notebooks. These include Dynamics.nb and controls.nb which introduce the basic modeling and.
  27. [PDF]

    SATURDAY, OCTOBER 25, 2008 - Wolfram Research

    www.wolfram.com/news/events/.../UC08Schedule_102508.pdf‎


    Oct 25, 2008 - Tutorials. Homewood. 7:00AM. 7:30AM. 8:00AM. 8:30AM. 9:00AM. 9:30AM. Transcendental Roots. Adam Strzebonski. Data Collections.
  28. [PDF]

    THURSDAY, OCTOBER 23, 2008 - Wolfram Research

    www.wolfram.com/news/events/.../UC08Schedule_102308.pdf‎


    Oct 23, 2008 - THURSDAY, OCTOBER 23, 2008. Wolfram Research Developer Talks. Little Chief. Tutorials. Homewood. Mathematica-Based Applications.
  29. [PDF]

    FRIDAY, OCTOBER 24, 2008 - Wolfram Research

    www.wolfram.com/news/events/.../UC08Schedule_102408.pdf‎


    Oct 24, 2008 - Dinner 6:30pm–9:30pm, Illini Ballroom. Mathematics & Science. Fighting Illini. Wolfram Research Developer Talks. Homewood. Tutorials.
  30. [PDF]

    MathOptimizer - Wolfram Research

    www.wolfram.com/products/applications/mathoptimizer/manual.pdf‎


    Consulting, workshops and tutorials, as well as customized software development – related to MathOpti- mizer and to other advanced system modeling and ...

No comments:

Mathematics And Algorithms (free ebook from Wolfram Tutorials)

http://www.wolfram.com/learningcenter/tutorialcollection/MathematicsAndAlgorithms/MathematicsAndAlgorithms.pdf


Mathematics and Algorithms
Look Inside
Mathematics and Algorithms
Pages: 461, b&w
ISBN: 978-1-57955-054-7
Year: 2008
PRINT VERSION:
$ 19.95
Buy Now
Download Free PDF | Web Version
Description

Mathematica has the most extensive collection of mathematical functions ever assembled. Often relying on original results and algorithms developed at Wolfram Research over the past two decades, each function supports a full range of symbolic operations, as well as efficient numerical evaluation to arbitrary precision, for all complex values of parameters. Topics covered in this collection include algebraic calculations and manipulation, linear algebra, calculus, series and limits, numerical operations, and mathematical functions.

Table of Contents

Numbers | Algebraic Calculations | Algebraic Manipulation | Manipulating Equations and Inequalities | Linear Algebra | Series, Limits and Residues | Calculus | Numerical Operations on Functions | Numerical Operations on Data | Mathematical Functions


No comments:

Dec 10, 2013

Mathematica advanced intro

http://www.mathprogramming-intro.org/download/MathProgrammingIntro.pdf
No comments:

Nov 17, 2013

EMIS ELibM: Mathematical Collections and Conference Proceedings

http://www.emis.de/proceedings/index.html

  • 8th International Conference Words 2011
    Prague, Czech Republic, 12-16th September 2011
  • Workshop on Finsler Geometry and Its Applications
    Debrecen, Hungary, 24–29 May 2009
  • Geometry, Integrability and Quantization VIII 
    Varna, Bulgaria: June 9–14, 2006.
  • The 26th Winter School Geometry and Physics
    Srni, Czech Republic, 14–21 January 2006
  • Contemporary geometry and Related Topics
    Neda Bokan, Mirjana Djorić, Anatoly T. Fomenko, Zoran Rakić, Bernd Wegner, Julius Wess (eds.), Belgrade, Serbia and Montenegro 26 June–2 July 2005
  • The 29th International Conference of the International Group for the Psychology of Mathematics Education
    Helen Chick and Jill L. Vincent (eds.), Melbourne, Australia 10–15 July 2005
  • Geometry, Integrability and Quantization VII 
    Varna, Bulgaria: June 2–10, 2005.
  • The 28th International Conference of the International Group for the Psychology of Mathematics Education
    Marit Johnsen Høines and Anne Berit Fuglestad (eds.), Bergen, Norway 14–18 July, 2004
  • New Developments in Electronic Publishing
    Hans Becker, Kari Stange, Bernd Wegner (eds). Stockholm, Sweden: 25–27 June, 2004
  • Geometry, Integrability and Quantization VI 
    Varna, Bulgaria: June 3–10, 2004.
  • Geometry, Integrability and Quantization V 
    Varna, Bulgaria: June 5–12, 2003.
  • Geometry, Integrability and Quantization IV 
    Varna, Bulgaria: June 6–15, 2002.
  • Mathematical Knowledge Management (MKM'2001) 
    Schloss Hagenberg, Austria: September 24–26, 2001
  • Workshop on Special Geometric Structures in String Theory 
    Dmitri V. Alekseevsky, Vicente Cortés, Chandrashekar Devchand and Antoine Van Proeyen (eds.). Bonn, Germany: 8–11 Sep 2001
  • Margarita mathematica en memoria de José Javier (Chicho) Guadalupe Hernández 
    Luis Español and Juan L. Varona (eds.), Logroño, Spain: 2001
  • Geometry, Integrability and Quantization III 
    Varna, Bulgaria: September 1–10, 2001.
  • TOPOSYM 2001 
    Prague, Chech Republic: August 19–25, 2001
  • Geometry, Integrability and Quantization II 
    Varna, Bulgaria: June 7–15, 2000.
  • AMS Special Session on Nonabsolute Integration 
    Pat Muldowney and Erik Talvila (eds.). Toronto, Canada: 23–24 Sep 2000
  • ALGORITMY 2000 
    Podbanske, Slovakia: September 10–15, 2000
  • Geometry & Applications 
    Novosibirsk, Russia: March 13–16, 2000
  • Steps in Differential Geometry 
    Debrecen, Hungary: July 25–30, 2000
  • Geometry, Integrability and Quantization I 
    Varna, Bulgaria: September 1–10, 1999.
  • Summer School on Differential Geometry 
    Coimbra, Portugal: September 3–7, 1999
  • International Congress of Mathematicians (ICM 1998) 
    Berlin, Germany: August 18–27, 1998
  • Second Meeting on Quaternionic Structures in Mathematics and Physics 
    Roma, Italy: September 6–10, 1999
  • Meeting on Quaternionic Structures in Mathematics and Physics 
    Trieste, Italy: September 5–9, 1994
  • The International Conference on Secondary Calculus and Cohomological Physics 
    Moscow, Russia: August 24–August 31, 1997
  • 1st International Meeting on Geometry and Topology 
    Braga, Portugal: September 11–13, 1997
  • 9th International Conference on Domain Decomposition Methods 
    Ullensvang, Norway: June 3–8, 1996
  • XIV C.E.D.Y.A. / IV C.M.A. 
    Vic, Spain: September 18–22, 1995
  • Nonlinear Analysis, Function Spaces and Applications Vol. 6 
    Prague, Czech Republic: May 31–June 5, 1998
  • Nonlinear Analysis, Function Spaces and Applications Vol. 5 
    Prague, Czech Republic: May 23–28, 1994
  • Function Spaces, Differential Operators and Nonlinear Analysis 
    Paseky na Jizerou, Czech Republic: September 3–9, 1995
  • Surgery and Geometric Topology 
    Josai University, Sakado, Japan: September 17–20, 1996
  • 3rd International Conference on Approximation and Optimization in the Caribbean 
    Puebla, Mexico: October 8–13, 1995
  • 7th International Conference on Differential Geometry and Its Applications 
    Brno, Czech Republic: August 10–14, 1998
  • 6th International Conference on Differential Geometry and Its Applications 
    Brno, Czech Republic: August 28–September 1, 1995
  • 5th International Conference on Differential Geometry and Its Applications 
    Opava, Czechoslovakia: August 24–28, 1992
No comments:

Nov 16, 2013

Differential Geometry: A beginner's journey.

A good summary:

http://www.math.uga.edu/~shifrin/ShifrinDiffGeo.pdf

Focusing on surface:

http://en.wikipedia.org/wiki/Differential_geometry_of_surfaces?action=render

Applications of Differential Geometries:

Helping to solve other unsolved maths problem:

http://en.wikipedia.org/wiki/List_of_unsolved_problems_in_mathematics

Possible applications of differential geometry concepts:
  1. Elementary Geometry

  2. Center of an arc determined with straightedge and compass.
  3. Surface areas: Circle, trapezoid, triangle, sphere, frustum, cylinder, cone...
  4. Power of a point  with respect to a circle.
  5. Euler's line  goes through the orthocenter, the centroid and the circumcenter.
  6. Euler's circle  is tangent to the incircle and the excircles  (Feuerbach, 1822).
  7. Barycentric coordinates & trilinears  examplify  homogeneous coordinates.
  8. Elliptic arc: Length of the arc of an ellipse between two points.
  9. Perimeter of an ellipse. Exact formulas and simple ones.
    • Circumference of an ellipse: Unabridged discussion.
  10. Surface of an ellipse.
  11. Volume of an ellipsoid  (either a spheroid or a scalene ellipsoid).
  12. Surface area of a spheroid  (oblate or prolate ellipsoid of revolution).
    • Surface area of a general ellipsoid.
  13. Quadratic equations in the plane describe ellipses, parabolas, or hyperbolas.
  14. Centroid of a circular segment. Find it with Guldin's (Pappus) theorem.
  15. Parabolic arc of given extremities  with a prescribed apex between them.
  16. Focal point of a parabola. y = x 2 / 4f (where f is the focal distance).
  17. Parabolic telescope: The path from infinity to focus is constant.
  18. Make a cube go through a hole in a smaller cube.
  19. Octagon: The relation between side and diameter.
  20. Constructible regular polygons  and constructible angles (Gauss).
  21. Areas of regular polygons of unit side: General formula & special cases.
  22. For a regular polygon of given perimeter, the more sides the larger the area.
  23. Curves of constant width: Reuleaux Triangle and generalizations.
  24. Irregular curves of constant width. With or without any circular arcs.
  25. Solids of constant width. The three-dimensional case.
  26. Constant width in higher dimensions.
  27. Fourth dimension. Difficult to visualize, but easy to consider.
  28. Volume of a hypersphere and hyper-surface area, in any dimensionality.
  29. Hexahedra. The cube is not the only polyhedron with 6 faces.
    • Unabridged discussion.
  30. Descartes-Euler Formula: F-E+V=2 but restrictions apply.

    Topology:

  31. Metric spaces:  The motivation behind more general  topological  spaces.
  32. Abstract topological spaces  are defined by calling some subsets  open.
  33. Closed sets  are sets (of a topological space) whose complements are open.
  34. Subspace F of E:  Its open sets are the intersections with F of open sets of E.
  35. Separation axioms:  Flavors of topological spaces, according to  Trennung.
  36. Compactness of a topological space:  Any open cover has a  finite subcover.
  37. Real-valued continuous functions on compact sets  attain their extremes.
  38. Borel sets.  Tribes  form the topological foundation for  measure theory.
  39. Locally compact sets  contain a  compact neighborhood  of every point.
  40. General properties of sequences  characterize topological properties.
  41. Continuous functions  let the  inverse image  of any open set be open.
  42. Restrictions remain continuous.  Continuous extensions may be impossible.
  43. The product topology  makes projections continuous on a cartesian product.
    • Tychonoff's Theorem:  Any product of compact spaces is compact.
  44. Connected sets  can't be split by open sets.  The empty set  is  connected.
  45. Path-connected sets  are a special case of  connected sets.
  46. Homeomorphic sets.  An  homeomorphism  is a  bicontinuous function.
  47. Arc-connected spaces are path-connected.  The converse need not be true.
  48. Homotopy:  A progessive transformation of a  function  into another.
  49. The fundamental group:  The homotopy classes of all loops through a point.
  50. Homology and Cohomology.  Poincaré duality.
  51. Descartes-Euler Formula:  F-E+V = 2, but restrictions apply.
  52. Euler Characteristic:   c   (chi)  extended beyond its traditional definition...
  53. Winding number  of a continuous planar curve about an outside point.
    • The  dog on a leash theorem.
    • A topological  proof of the fundamental theorem of algebra.
  54. Fixed-point theorems  by  Brouwer,  Shauder  and  Tychonoff.
  55. Turning number  of a planar curve with a well-defined oriented tangent.
  56. Real projective plane  and Boy's surface.
  57. Hadwiger's  additive continuous functions of d-dimensional rigid bodies.
  58. Eversion of the sphere.  An homotopy  can  turn a sphere inside out.
  59. Classification of surfaces:  "Zero Irrelevancy Proof" (ZIP) by J.H. Conway.
  60. Braid groups:  Strands, braids and pure braids.

    Completeness:

  61. Complete metric space:  A space in which all Cauchy sequences converge.
  62. Flawed alternatives to completeness.
  63. Banach spaces  are complete normed vector spaces.
  64. Fréchet spaces  are generalized Banach spaces.

    Fractal Geometry:

  65. Fractional exponents  were first conceived by Nicole d'Oresme (c. 1360).
  66. The von Koch curve (and  snowflake):  Dimension of self-similar objects.
  67. Hausdorff dimension is revealed by a covering with balls of radius  < e.
  68. The Julia set and the Fatou set of an analytic function  are complementary.
  69. The Mandelbrot set was so named by  Adrien Douady  &  John H. Hubbard.

    Angles and Solid Angles:

  70. Planar angles  (from one direction to another)  are  signed  quantities.
  71. Bearing:  Unless otherwise specified, this is the angle  west of north.
  72. Solid angles  are to spherical patches what planar angles are to circular arcs.
  73. Circular measures:  Angles and solid angles aren't quite dimensionless...
  74. Solid angle formed by a trihedron :   Van Oosterom & Strackee  (1983).
  75. Solid angle subtended by a rhombus.  Apex of a right  rhombic pyramid.
  76. Formulas for solid angles  subtended by patches with simple shapes.
  77. Right ascension and declination.  Precession of celestial coordinates  (a,d).

    Curvature and Torsion:

  78. Curvature of a planar curve:  Variation of inclination with distance  dj/ds.
  79. Curvature and torsion  of a three-dimensional curve.
  80. Distinct curvatures and  geodesic  torsion  of a curve drawn on a surface.
  81. The two fundamental quadratic forms  at a point of a parametrized surface.
  82. Lines of curvature:  Their  normal  curvature is extremal at every point.
  83. Geodesic lines.  Least length is achieved with  zero geodesic curvature.
  84. Meusnier's theorem:  Tangent lines have the same  normal curvature.
  85. Gaussian curvature of a surface.  The  Gauss-Bonnet theorem.
  86. Parallel-transport of a vector around a loop.  Holonomic angle of a loop.
  87. Total curvature of a curve.  The Fary-Milnor theorem for knotted curves.
  88. Linearly independent components  of the  Riemann curvature tensor.

    Planar Curves:

  89. Cartesian equation of a straight line:  passing through two given points.
  90. Confocal Conics:  Ellipses and hyperbolae sharing the same pair of  foci.
  91. Spiral of Archimedes:  Paper on a roll, or groove on a vinyl record.
  92. Hyperbolic spiral:  The inverse of the  Archimedean spiral.
  93. Catenary:  The shape of a thin chain under its own weight.
  94. Witch of Agnesi.  How the versiera (Agnesi's cubic) got a weird name.
  95. Folium of Descartes.
  96. Lemniscate of Bernoulli:  A quartic curve shaped like the  infinity symbol.
  97. Along a Cassini oval, the product of the distances to the two foci is constant.
  98. Limaçons of Pascal:  The cardioid  (unit epicycloid) is a special case.
  99. On a Cartesian oval, the weighted average distance to two poles is constant.
  100. The envelope of a family of curves  is everywhere tangent to one of them.
  101. The evolute of a curve  is the locus of its centers of curvature.
  102. Involute of a curve:  Trajectory of a point of a line  rolling  on that curve.
  103. Parallel curves  share their normals, along which their distance is constant.
  104. The nephroid  (or  two-cusped epicycloid )  is a  catacaustic  of a circle.
  105. Freeth's nephroid:  A special  strophoid  of a circle.
  106. Bézier curves  are algebraic splines.  The cubic type is the most popular.
  107. Piecewise circular curves:  The traditional way to specify curved forms.
  108. Intrinsic equation  [curvature as a function of arc length]  may have  spikes.
  109. The quadratrix (trisectrix) of Hippias squares the circle and trisects angles.
  110. The parabola  is  constructible  with straightedge and compass.
  111. Mohr-Mascheroni constructions  use the compass alone  (no straightedge).




Collection of Mathematica articles:

http://demonstrations.wolfram.com/siteindex.html




No comments:

Nov 13, 2013

(good book) Lectures on Discrete and Polyhedral Geometry (Igor Pak Home Page)

http://www.math.ucla.edu/~pak/book.htm
1 comment:

Nov 9, 2013

A generalization of a number pattern from base 10 to base 16, and base 20, and base 32


First looking at the decimals number patterns:

12*9+3 : 111
123*9+4 : 1111
1234*9+5 : 11111
12345*9+6 : 111111
123456*9+7 : 1111111
1234567*9+8 : 11111111
12345678*9+9 : 111111111
123456789*9+10 : 1111111111

And the python generator for this:

def get_first(p1, mynum):
   
    p2 = p1 + str(mynum)
    n2 = int(p2) * 9 + (mynum+1)
    print "%s*9+%d : %d"%(p2,mynum+1, n2)
    get_first(p2, mynum+1)

get_first("1", 2)
   
Can it be generalize to base 16?

Yes:

12*15+0x3 : 0x111
123*15+0x4 : 0x1111
1234*15+0x5 : 0x11111
12345*15+0x6 : 0x111111
123456*15+0x7 : 0x1111111
1234567*15+0x8 : 0x11111111
12345678*15+0x9 : 0x111111111L
123456789*15+0xa : 0x1111111111L
123456789a*15+0xb : 0x11111111111L
123456789ab*15+0xc : 0x111111111111L
123456789abc*15+0xd : 0x1111111111111L
123456789abcd*15+0xe : 0x11111111111111L
123456789abcde*15+0xf : 0x111111111111111L
123456789abcdef*15+0x10 : 0x1111111111111111L

And the program is:

def pattern_base16(p1, mynum):
    p2 = p1 + hex(int(str(mynum)))[2:]
    n2 = int(p2,16) * 15 + (mynum+1)
    print "%s*15+%s : %s"%(p2,hex(mynum+1), hex(n2))
    pattern_base16(p2, mynum+1)

pattern_base16("1", 2)

And for base 20:

12*19+3 : 111
123*19+4 : 1111
1234*19+5 : 11111
12345*19+6 : 111111
123456*19+7 : 1111111
1234567*19+8 : 11111111
12345678*19+9 : 111111111
123456789*19+a : 1111111111
123456789a*19+b : 11111111111
123456789ab*19+c : 111111111111
123456789abc*19+d : 1111111111111
123456789abcd*19+e : 11111111111111
123456789abcde*19+f : 111111111111111
123456789abcdef*19+g : 1111111111111111
123456789abcdefg*19+h : 11111111111111111
123456789abcdefgh*19+i : 111111111111111111
123456789abcdefghi*19+j : 1111111111111111111
123456789abcdefghij*19+10 : 11111111111111111111

and the program is:

from baseconv import BaseConverter

def base10_to_20(nos):
    base20 = BaseConverter('0123456789abcdefghij')
    return base20.encode(nos)

def base20_to_10(mystring):
    base20 = BaseConverter('0123456789abcdefghij')
    return int(base20.decode(mystring))

def pattern_base20(p1, mynum):
    p2 = p1 + base10_to_20(mynum)
    #print "p2=%s"%p2
    n2 = base20_to_10(p2) * 19 + (mynum+1)
    print "%s*19+%s : %s"%(p2, base10_to_20(mynum+1), base10_to_20(n2))
    pattern_base20(p2, mynum+1)

pattern_base20("1", 2)

And for base 32:

12*31+3 : 111
123*31+4 : 1111
1234*31+5 : 11111
12345*31+6 : 111111
123456*31+7 : 1111111
1234567*31+8 : 11111111
12345678*31+9 : 111111111
123456789*31+a : 1111111111
123456789a*31+b : 11111111111
123456789ab*31+c : 111111111111
123456789abc*31+d : 1111111111111
123456789abcd*31+e : 11111111111111
123456789abcde*31+f : 111111111111111
123456789abcdef*31+g : 1111111111111111
123456789abcdefg*31+h : 11111111111111111
123456789abcdefgh*31+i : 111111111111111111
123456789abcdefghi*31+j : 1111111111111111111
123456789abcdefghij*31+k : 11111111111111111111
123456789abcdefghijk*31+l : 111111111111111111111
123456789abcdefghijkl*31+m : 1111111111111111111111
123456789abcdefghijklm*31+n : 11111111111111111111111
123456789abcdefghijklmn*31+p : 111111111111111111111111
123456789abcdefghijklmnp*31+q : 1111111111111111111111111
123456789abcdefghijklmnpq*31+r : 11111111111111111111111111
123456789abcdefghijklmnpqr*31+s : 111111111111111111111111111
123456789abcdefghijklmnpqrs*31+t : 1111111111111111111111111111
123456789abcdefghijklmnpqrst*31+u : 11111111111111111111111111111
123456789abcdefghijklmnpqrstu*31+v : 111111111111111111111111111111
123456789abcdefghijklmnpqrstuv*31+w : 1111111111111111111111111111111
123456789abcdefghijklmnpqrstuvw*31+10 : 11111111111111111111111111111111

And the program is:

from baseconv import BaseConverter

def base10_to_32(nos):
        base32 = BaseConverter('0123456789abcdefghijklmnpqrstuvw')
        return base32.encode(nos)

def base32_to_10(mystring):
        base32 = BaseConverter('0123456789abcdefghijklmnpqrstuvw')
        return int(base32.decode(mystring))

def pattern_base32(p1, mynum):
    p2 = p1 + base10_to_32(mynum)
    #print "p2=%s"%p2
    n2 = base32_to_10(p2) * 31 + (mynum+1)
    print "%s*31+%s : %s"%(p2, base10_to_32(mynum+1), base10_to_32(n2))
    pattern_base32(p2, mynum+1)

The BaseConverter python module is downloaded following the two articles below:

http://stackoverflow.com/questions/2267362/convert-integer-to-a-string-in-a-given-numeric-base-in-python

https://bitbucket.org/semente/baseconv






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