When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
By David Housman, Richard Alan Gillman. Richard Alan Gillman is a mathematics professor at Valparaiso University. David Housman teaches courses in applied mathematics and computer science at Goshen College.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.