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May
24
reviewed Close What is the meaning of $:s$ after a mathematical symbol?
May
12
reviewed Leave Open How to detect all points of rectangle by given one point A, height, width, and angle between AC and X axis?
May
12
reviewed Close What are some good math books 1st grade highschool student can understand?
May
12
reviewed Leave Open What's the maximum speed of snake so that the frog can escape?
May
12
reviewed Leave Open Can anyone help me with this improper integral?
May
12
reviewed Leave Open Working out my exam grade
May
12
reviewed Leave Open Generalization of Chinese Remainder Theorem
May
11
reviewed Leave Open dimension of a direct sum is the sum of the separate dimensions
May
11
reviewed Leave Open How to prove this inequality $(\sum_i x_i y_i)^2 - \sum_i x_i^2y_i^2 \leq 1-1/n$?
May
11
reviewed Leave Open Can anyone explain why this series converges?
May
11
reviewed Close What is the maximal path of a tree?
May
11
reviewed Leave Open On the existence of a non-regular language $L$ such that $L^2\in \text{Reg}$?
May
11
reviewed Leave Open Solving $T(n) = 3T(n-1)$
May
6
reviewed Reject Common tangent to a circle and ellipse
May
2
reviewed Approve Orthogonal circles
Apr
3
reviewed Reject Why only the numerator is derived?
Jan
27
reviewed Reject If $|B\times A| = 15$ ,evaluate: $|A\cap B|$
Jan
10
reviewed Reject Give a direct proof of the fact that $a^2-5a+6$ is even for any $a \in \mathbb Z$
Nov
18
reviewed Edit If the number $x$ is algebraic, then $x^2$ is also algebraic
Oct
4
reviewed Approve Prove all multiples of $U$ contain all the digits $0$ to $9$