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Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: intuitionism
Replies: 16   Last Post: Nov 1, 2009 3:33 AM

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Keith Ramsay

Posts: 1,745
Registered: 12/6/04
Re: intuitionism
Posted: Oct 27, 2009 2:39 AM
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On Oct 26, 9:16 am, nukeymusic <nukeymu...@gmail.com> wrote:
|Thanks for the hint, could you explain in words what the meaning is
of
|the leftmost symbol, I guess it is in fact the "not-version" of a
|symbol?

|= is a symbol used to mean "is a model of" as in "M |= X" or
is valid, and yes, the bar through it negates it. Hence
"p or not p is not valid".

Keith Ramsay

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