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Mar
14
answered Prove that if $N(z)$ is irreducible in $\Bbb{Z}$ then $z$ is irreducible in $\Bbb{Z}[\sqrt{\alpha}]$.
Feb
15
answered Elementary question on stabilizer and S3
Feb
7
answered The function given by the Rao-Blackwell theorem is a statistic
Feb
1
answered Proving the minimality of an element order
Jan
22
answered Why is every sequential map uniformly continuous
Nov
30
answered Probability and recurrence
Nov
3
answered imprisoned in a cell where there are only 3 ways out ,each of which are equally likely
Nov
1
answered How to prove that: $f(A\cap B) \subseteq f(A) \cap f(B)$, and some few others
Nov
1
answered How to find a non-Gaussian function f(x) that satisfies the following condition:
Oct
27
answered How do you say that variable is randomly chosen with a random distribution for range [3, 42]?
Oct
21
answered Last 3 digits of $7^{12341}$
Sep
23
answered $\sum_{k=0}^n \binom{n}{k}^2 = \binom{2n}{n}?$
Sep
14
answered Forming a new matrix by adding the same number to any row or column
Sep
10
asked Forming a new matrix by adding the same number to any row or column
Aug
28
answered Why is this simplex procedure not working? $\min z = y - x + 1$
May
31
answered If $y=x^{x^{x^{x^{x^{.^{.^{.}}}}}}}$ then how $y=x^y$?
Sep
21
asked On the roots of $t^4-6\sqrt3t^3+8t^2+2\sqrt3t-1=0$
Aug
15
answered How many ways can $2m$ be represented as the sum of 4 natural numbers $\le m$?
Mar
29
answered The minimum value of $a^2+b^2+c^2+\dfrac{1}{a^2}+\dfrac{1}{b^2}+\dfrac{1}{c^2}?$
Mar
24
answered Proving that there are relatively prime elements (Posa problem)