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  • 0 posts edited
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  • 64 votes cast
Jul
29
comment Characterising functions $f$ that can be written as $f = g \circ g$?
Thanks - fixed it.
Jul
29
revised Characterising functions $f$ that can be written as $f = g \circ g$?
fixed mistake in second example
Jul
29
asked Characterising functions $f$ that can be written as $f = g \circ g$?
Jul
29
comment Group With an Endomorphism That is “Almost” Abelian is Abelian.
@Mariano, why don't you give that as the answer and then it can be accepted? Otherwise it looks as though nobody has answered the question.
Jul
29
accepted Why is the “finitely many” quantifier not definable in First Order Logic?
Jul
29
accepted How do you determine if a point sits inside a polygon?
Jul
29
accepted Why is $x^0 = 1$ except when $x = 0$?
Jul
28
accepted Why is the volume of a cone one third of the volume of a cylinder?
Jul
28
answered Optimal Strategy for Deal or No Deal
Jul
28
accepted Is $0$ a natural number?
Jul
28
comment Why is the “finitely many” quantifier not definable in First Order Logic?
Yes, I agree that the fact that I could define $P_3$ was irrelevant because of the inability to form an infinite disjunction, but I included it to give the question a bit of a context.
Jul
28
asked Why is the “finitely many” quantifier not definable in First Order Logic?
Jul
28
comment If $A$ is a subobject of $B$, and $B$ a subobject of $A$, are they isomorphic?
I don't know the answer to your question but being antisymmetric is stronger than what you have here. If 'being a subject of' is antisymmetric then A and B should not just be isomorphic but identical.
Jul
28
comment How do the Properties of Relations work?
@Charles: (Deleted old comment too). To tell you the truth, I felt as though the question didn't make much sense -- it was more like "please explain the entire theory of relations including all relevant distinctions". So I thought I'd at least define the terms properly.
Jul
27
awarded  Beta
Jul
27
awarded  Nice Question
Jul
27
comment Why is the derivative of a circle's area its perimeter (and similarly for spheres)?
I hadn't thought of this. Does this also explain why it works in 3 dimensions?
Jul
27
awarded  Critic
Jul
26
comment How do the Properties of Relations work?
I think you have mixed up the definitions of asymmetric and antisymmetric in this -- could you edit your post to fix this? (or indicate a reference which uses the words in the way you have).
Jul
25
comment Why 1 is not considered to be a prime number?
You can still edit though, can't you?