About: http://webisa.webdatacommons.org/220852264

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	May 9, 2009 This is to Bruce Sherwood: Does Michael Oehrtmann know that he is reinventing the old ???infinitesimals??? approach to calculus, and that there is a free textbook on the web? http://www.math.wisc.edu/~keisler/calc.html
http://www.w3.org/ns/prov#wasQuotedFrom	scienceblogs.com