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Feb
9
comment Formal proof involving $\varphi( v_k / v_l )$
@CarlMummert Thanks, I wasn't aware of this. I added some more information to the question.
Feb
9
revised Formal proof involving $\varphi( v_k / v_l )$
added 159 characters in body
Feb
8
comment Non-standard models of arithmetic for Dummies
+1 and a Nice Answer badge from me : )
Feb
8
answered uniform continuity in metric space
Feb
8
comment uniform continuity in metric space
Wikipedia says that "Every Lipschitz continuous map between two metric spaces is uniformly continuous. In particular, every function which is differentiable and has bounded derivative is uniformly continuous."
Feb
8
comment How to prove: $n! \times (n+1) = (n+1)!$
Similar question: math.stackexchange.com/questions/101644/multiply-factorial
Feb
8
asked Formal proof involving $\varphi( v_k / v_l )$
Feb
6
comment Contradiction Theorem
@tri Mostly, the "easier" proofs are either by induction or by contradiction (or by contraposition, as in my answer above). So if you want to prove something first check if you can use any of these techniques.
Feb
5
revised Classifying a point on the unit ball of a normed space as extreme depending on the field
Tags edited.
Feb
4
revised What is the difference between Completeness and Soundness in first order logic?
deleted 136 characters in body
Feb
4
answered What is the difference between Completeness and Soundness in first order logic?
Feb
3
revised Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
added 59 characters in body
Feb
3
revised Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
deleted 136 characters in body
Feb
3
revised Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
added 68 characters in body
Feb
3
comment Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
@ArturoMagidin Yes thank you, that comment is actually misleading as $\mathbb{Z}[\frac{i}{2}]$ is not a field. I'm going to rewrite it.
Feb
3
revised Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
added 303 characters in body
Feb
3
comment Prove $C(A)=A\cup\partial A$.
Possible duplicate of math.stackexchange.com/questions/101602/….
Feb
3
comment Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
Dear Arturo. You are amazingly fast. I am posting my answer, even though your perfect answer is already here. I hope you don't mind. +1 from me.
Feb
3
answered Questions about specific examples of ideals, evaluation morphism, adjunction of elements, and characteristics of rings
Feb
3
answered Probability question (Six dice)