ED239856.pdf

http://files.eric.ed.gov/fulltext/ED239856.pdf

Invitation-to-Number-Theory.pdf

http://www.foresthillshs.org/ourpages/auto/2011/11/2/74617344/Invitation-to-Number-Theory.pdf

Crux_v15n06_Jun.pdf

https://cms.math.ca/crux/backfile/Crux_v15n06_Jun.pdf

First Concepts of Topology.pdf

http://elienasrallah.com/dl/First%20Concepts%20of%20Topology.pdf

The_Contest_III

http://refkol.ro/matek/Gordiusz%20felkeszito/The%20contest/The_Contest_III.pdf

The_Contest_IV

http://refkol.ro/matek/Gordiusz%20felkeszito/The%20contest/The_Contest_IV.pdf

THE CONTEST PROBLEM BOOK VI

https://matikzone.files.wordpress.com/2011/02/6-the-contest-problem-book-vi-1989-1994.pdf

Feature Column: Knot Quandaries Quelled by Quandles

http://www.ams.org/samplings/feature-column/fc-2016-03

Rodrigues' Rotation Formula (with application to Robotics)

http://mathworld.wolfram.com/RodriguesRotationFormula.html

https://en.wikipedia.org/wiki/Rodrigues'_rotation_formula 

https://en.wikipedia.org/wiki/Rodrigues'_formula

http://www.sciencedirect.com/science/article/pii/S0094114X09001372 

http://www.sciencedirect.com/science/article/pii/S0094114X0500087X 

http://www.sciencedirect.com/science/article/pii/S0094114X15000415 

http://www.cs.cmu.edu/afs/cs/academic/class/16741-s07/www/Lecture7.pdf 

http://www.physicspages.com/2012/07/22/hermite-polynomials-the-rodrigues-formula/ 

http://www.phys.ufl.edu/~fry/6346/legendre.pdf 

http://www.ams.org/journals/tran/1965-115-00/S0002-9947-1965-0199460-7/S0002-9947-1965-0199460-7.pdf 

http://www.nbi.dk/~polesen/borel/node4.html  https://www.youtube.com/watch?v=jtD2rhkXnGU 

Feature Column from the AMS

http://www.ams.org/samplings/feature-column/fcbrowse?year=2015

There are so many interesting articles:

Cubes
by Joe Malkevitch
January, 2004

Colorful Mathematics: Part IV
by Joe Malkevitch
December, 2003

Colorful Mathematics: Part III
by Joe Malkevitch
November, 2003

Colorful Mathematics: Part II
by Joe Malkevitch
October, 2003

Colorful Mathematics: Part I
by Joe Malkevitch
September, 2003

A Discrete Geometrical Gem
by Joe Malkevitch
August, 2003

Primes
by Joe Malkevitch
June, 2003

Oriented Matroids: The Power of Unification
by Joe Malkevitch
May, 2003

Mathematics and Art
by Joe Malkevitch
April, 2003

Combinatorial Games (Part II) -Different Moves for Left and Right
by Joe Malkevitch
March, 2003

Digital Revolution (III) - Error Correction Codes
by Joe Malkevitch
February, 2003

Matroids: The Value of Abstraction
by Joe Malkevitch
January, 2003

Combinatorial Games (Part I): The World of Piles of Stones
by Joe Malkevitch
December, 2002

Linkages (Part II) - Old Wine in New Bottles
by Joe Malkevitch
November, 2002

October: Digital Revolution (II) - Compression Codes and Technologies
by Joe Malkevitch
October, 2002

September: Linkages: From Fingers to Robot Arms (I) Introduction
by Joe Malkevitch
September, 2002

July/August: The Digital Revolution (I) - Barcodes: Introduction
by Joe Malkevitch
August, 2002

And a lot more.....