Section 15.3 Reference Topics
This site also investigates the four-color problem:
http://www-groups.dcs.st-andrews.ac.uk/~history/HistTopics/The_four_colour_theorem.html
A beautiful gallery of fractal designs are found on this site:
http://www.cygnus-software.com/gallery/stampindex.htm
A site showing some of Escher's tessellations is interesting:
http://www.mathacademy.com/pr/minitext/escher/
This site shows shows a few nice-looking color tessellations (be sure to press on the small
letters "Enter the Site."
http://library.thinkquest.org/16661/
This site shows the colorful answer to Problem 25:
http://reglos.de/pentominos/
You will find a wealth of information on fractals on the web. It wasn't until we had computers
that we could fully appreciate this topic. We list just a few here.
http://math.rice.edu/~lanius/frac/
This site has many links:
http://archives.math.utk.edu/topics/fractals.html
http://www.kcsd.k12.pa.us/~projects/fractal/
http://www.math.utah.edu/~alfeld/math/mandelbrot/mandelbrot.html
http://www.ncsa.uiuc.edu/Edu/Fractal/Fractal_Home.html
If you are really interested or fascinated by fractals, here is a site listed
software sources and products:
http://home.att.net/~Paul.N.Lee/Fractal_Software.html
This a site dealing with pentominos. This site shows the all pentamino solutions (you need to click on one of the numbers to see the
particular solution). It also has links to other sites.
http://www.forwiss.uni-erlangen.de/~kinderma/pentominos.html
This site using trominos is interactive and really gives good insight about how pentominos are
used to tile a grid.
http://www.utc.edu/~cpmawata/trominos/