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BrianO

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 5 years, 3 months
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27 Is the negation of a non-theorem a theorem? Nov 7 '15
22 Is every relation which is transitive and symmetric also reflexive? Jul 5 '16
18 Quantifier: “For all sets” Dec 10 '15
14 Absolute value and max/min function: why $a + b + |a - b|=2\max(a,b)$? Jan 30 '16
14 Can a set be neither open nor closed? Oct 12 '15
9 Why is the Axiom of Infinity necessary? Jan 31 '16
8 Predicate Logic Expression: “Nobody loves anybody.” Feb 17 '16
8 Inverse of $A^{-1}+B^{-1}$ Oct 30 '15
7 What's the point of allowing only quantification of variables in first-order logic. Apr 17 '16
7 If $f:X\rightarrow Y$ and $V\subseteq Y$, does there exist $U\subseteq X$ such that $f(U)=V$? Jun 8 '16
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