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Nov
3
reviewed Approve Reflexivity of Relations
Nov
1
reviewed Reject Find the limit $\lim_{n\to\infty} \frac{(3n)! \, e^n}{(2n)!\,n^n\,8^n}$
Nov
1
reviewed Reject Find the limit $\lim_{n\to\infty} \frac{(3n)! \, e^n}{(2n)!\,n^n\,8^n}$
Oct
19
reviewed Reject Calculating factorial moment for distributions
Oct
8
reviewed Reviewed Integration proof: sin(1/x) is integrable
Oct
8
reviewed Reviewed Really large birthday problem as a spacefaring question.
Oct
8
reviewed Approve Which statements are equivalent to the parallel postulate?
Oct
8
reviewed Approve Which statements are equivalent to the parallel postulate?
Oct
8
reviewed Approve Problem of $\pi$- and $\lambda$-systems
Oct
8
reviewed Edit How is $ k+ 1 + \frac{1}{2}k(k+1) = \frac{1}{2}(k+1)(k+2)?$
Sep
19
reviewed Approve Combination Book Problem
Sep
19
reviewed Approve Proof that coprime cubes are divisible by $n$
Jun
21
reviewed Approve Which relations are partial orders
Jun
16
reviewed Approve What's the smallest number with first digit 1 that triples when this digit is moved to the end?
Jun
7
reviewed Approve Rotational vector fields
May
3
reviewed Approve Show that there exist $k$ and $r$ such that the given sum is divisible by $n$
Apr
20
reviewed Approve Proof of Equivalence of Sets
Apr
19
reviewed Approve Prove that for all positive integers $n$, $2^1+2^2+2^3+…+2^n=2^{n+1}-2$
Apr
18
reviewed Approve $X_1, \dots, X_n$ are independent random variables. Suppose $M = \min(X_1, X_2, \dots, X_n)$
Apr
18
reviewed Approve coordinate geometry : intersection of a curve with a line