YT2095 Posted September 26, 2004 Share Posted September 26, 2004 I`ve seen it alot in Physics, called Theta, I don`t rem what it was about though. Link to comment Share on other sites More sharing options...
Daymare17 Posted November 29, 2004 Share Posted November 29, 2004 How odd - the Mayans invented the 0 but never invented the wheel Link to comment Share on other sites More sharing options...
CPL.Luke Posted December 24, 2004 Share Posted December 24, 2004 when did number systems featuring zero arrive in europe? and how did the romans get by without a number to signify zero? Link to comment Share on other sites More sharing options...
matt grime Posted December 24, 2004 Share Posted December 24, 2004 The empty Set symbol is a capital letter phi, I looked it up. Usually the symbols for the empty set, whilst looking like phi's are not actually phi Link to comment Share on other sites More sharing options...
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