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Jun
11
reviewed Approve Composition of an injective and surjective function
May
27
reviewed Approve how to show that$ n<{2n \choose n}$ in sets
May
21
reviewed Close Demonstrate that the two formulae for a scalar product are equivalent.
May
21
reviewed Close Way to measure the similarity/difference of 2D point clouds
May
21
reviewed Close Given $g \in C^2(\mathbb{R})$ Study derivability of $f(x) = \frac{g(x)}{x}$
May
21
reviewed Close Closed form formula for discrete sums
May
21
reviewed Close What do the symbols $\mathbb{Z}$ and $\mathbb{Z}_n$ mean on this discrete math problem?
May
3
reviewed Reject Intuition: Why is the biconditional true if both statements are false?
Apr
10
reviewed Close Find $f(x) $ given that: $f'(x)=\frac{f(x)-x}{f(x)+x}$
Apr
10
reviewed Close Show that if $f,g:\Bbb{N}\to \Bbb{C}$ are multiplicative, then so is $f*g(n)=\sum_{d|n}{f(d)g({n\over d})}$.
Apr
6
reviewed Close How one can show $P(ax+n|x)=P(n)$?
Apr
6
reviewed Close Range or Domain of Primitive Recursive Function?
Apr
6
reviewed Leave Open Proving limit with epsilon delta
Apr
6
reviewed Close Solve this combination with a summation. Edited and maybe Solved
Apr
6
reviewed Close The function $f:G \rightarrow G$ defined by $f(x)=x^2$ is a homomorphism iff G is abelian.
Feb
9
reviewed Looks OK Fundamental Counting Principle
Feb
9
reviewed Close Prove by induction that $n! > n^2$
Feb
2
reviewed Approve Prove that for any integer, $n^2 + 5$ is not divisible by $4$.
Jan
18
reviewed Close How Many Sets of 5 Can You Make From 22 Elements?
Jan
18
reviewed Close Verify stokes theorem example