
Re: Notation query: "such that" = backwardsepisolon ?
Posted:
Jul 13, 1999 11:24 PM


fred@zip.com.au (Fred Curtis) wrote:   Whilst wandering through the MathML specs recently, I came across the  MathML entity &SuchThat which is equated to Unicode #220D, a backwards  greek epsilon.[...] what areas of mathematics have [this]?
This notation was introduced by Peano in 1898, and is still occasionally employed in logic, calculus, etc; cf. a few threads in MAA mathhistorylist located by searching the archive [1] for "backward epsilon".
Hopefully Jeff Miller will add this to the appropriate web page [2] in his pages on earliest uses of math words and symbols.
Bill Dubuque
[1] http://forum.swarthmore.edu/epigone/mathhistorylist/
[2] Earliest Uses of Symbols of Set Theory and Logic http://members.aol.com/jeff570/set.html

