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Nov
15
revised What do $\cup$ and $\cap$ mean here? (set theory)
added 68 characters in body; edited tags; edited title
Oct
25
comment Solve Diophantine Equations with powers
I'm voting to close this question as off-topic because it's multiple questions in one.
Oct
22
comment How do you represent the following sentences in first-order logic?
@YuxiangZhang Thanks, fixed.
Oct
22
revised How do you represent the following sentences in first-order logic?
fixed based on comment
Oct
21
reviewed Looks OK “Is not Lebesgue integrable”
Oct
21
reviewed Close Is some One Dimensional subalgebra an Ideal of the 2 Dimensional Non-Abelian Lie Algebra?
Oct
21
reviewed Looks OK $x^2+y^2+2axy=0 \Rightarrow x=0$ and $y=0$
Oct
21
reviewed Looks OK Proof by induction $\frac{1}{1^2} + \frac{1}{2^2} + \cdots + \frac{1}{n^2} < 2$
Oct
21
reviewed Leave Open how to express does not exist by quantifiers
Oct
21
awarded  Revival
Oct
19
reviewed Close Area of Probability Density Functions vs. Probability Mass Functions
Oct
19
reviewed Close Relation between an subspace $W$ and $int\, W$
Oct
11
reviewed Looks OK problem in contraction mapping
Oct
11
reviewed Close Meaning of explicit isomorphism of the orbit stabilizer theorem
Oct
11
reviewed Close Power of prime P in $nCr$
Oct
11
reviewed Close Addresses in decimal,binary,octal and hexadecimal
Oct
11
reviewed Close Prove $\nabla u \times \nabla v =0$ is a necessary and sufficient condition that $u$ and $v$ are functionally related by the equation $F(u,v) = 0$
Oct
11
reviewed Close Unbounded Linear Operator on Hilbert Space.
Oct
11
reviewed Close Expected value of a game in which one wins the square of the result of the last die roll
Oct
11
reviewed Close problem in contraction mapping