N. S.
Reputation
68,968
98/100 score
2 69 138
Impact
~1.1m people reached

# 68,968 Reputation

10 today
 +10 1 hour ago upvote How do we prove the rotation matrix in two dimensions not by casework?
55 yesterday
 +25 00:52 2 events Proof for $log\left(\sum_{n=1}^{\infty} \frac{1}{n}\right)$ diverging. +10 19:52 upvote Let $A$ be an infinite set, $B\subset A$, let $G \subset S_A$ where $f$ in $G$ implies $x\in B\implies f(x)\in B$. find example where $G$ not a group +10 12:51 upvote $\int\frac{\sin(nx) \sin x}{1-\cos x} \,dx$ by elementary methods +10 03:28 upvote If $z_0$ is a root of the equation $z^n\cos\theta_0+z^{n-1}\cos\theta_1+\cdots+\cos\theta_n=2$
105 2 days ago
 +40 23:40 4 events Proof for $log\left(\sum_{n=1}^{\infty} \frac{1}{n}\right)$ diverging. +20 23:51 2 events Can we say that $\det(A+B) = \det(A) + \det(B) +\operatorname{tr}(A) \operatorname{tr}(B) - \operatorname{tr}(AB)$. +15 14:58 accept $\int\frac{\sin(nx) \sin x}{1-\cos x} \,dx$ by elementary methods +10 14:25 upvote Number of solutions for the given equation in finite field of order 32. +10 01:22 upvote Only two groups of order $10$: $C_{10}$ and $D_{10}$ +10 00:06 upvote Complement of a bipartite graph 12:50 upvote Striking applications of integration by parts
65 Feb 4
35 Feb 3
105 Feb 2
150 Feb 1
125 Jan 31
20 Jan 30
12 Jan 29
18 Jan 28
165 Jan 27
30 Jan 26
75 Jan 25
20 Jan 24
80 Jan 23
200 Jan 22
40 Jan 21
105 Jan 20
60 Jan 19
250 Jan 18
65 Jan 17
20 Jan 16
20 Jan 15
123 Jan 14
130 Jan 13
40 Jan 12
55 Jan 11
120 Jan 10
95 Jan 9