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Topic: Notation query: "such that" = backwards-episolon ?
Replies: 10   Last Post: Jul 13, 1999 11:24 PM

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Bill Dubuque

Posts: 156
Registered: 12/6/04
Re: Notation query: "such that" = backwards-episolon ?
Posted: Jul 13, 1999 11:24 PM
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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 math-history-list
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/math-history-list/

[2] Earliest Uses of Symbols of Set Theory and Logic

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