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location Moscow, Russia
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visits member for 3 years, 9 months
seen 8 hours ago

umagon at google mail


Jan
6
revised How to prove $\sqrt{5+\sqrt{5+\sqrt{5-\sqrt{5+\sqrt{5+\sqrt{5+\sqrt{5-\cdots}}}}}}} = \frac{2+\sqrt 5 +\sqrt{15-6\sqrt 5}}{2}$
edited tags
Jan
6
revised $\operatorname{Hom}(f^*F, G) = \operatorname{Hom}(F, f_*G)$
tex in title
Jan
6
revised How to prove that $\sum_{i=0}^{a}\frac{i\binom{a+b-c-i}{a-i}\binom{c+i-1}{i}}{\binom{a+b-1}{a}}=\frac{ac(a+b)}{b(b+1)}$
formatting, tags
Jan
5
revised Finite subgroups of SO(3) are defined by ramified coverings of Riemann spheres
minor tex/formatting
Jan
5
revised Value of Riemann zeta function at $-1$
more descriptive title, edited tags
Jan
5
revised Sum of reciprocals of binomial coefficients
more descriptive title
Jan
4
revised Euclidean Algorithm - harder than usual
edited tags
Jan
4
revised Special Cases of Quadratic Reciprocity and Counting Fixed Points
more descriptive title
Jan
3
revised Jacobi symbol $\left(\frac{(n+1)/2}{n}\right)$
descriptive title; tags
Jan
3
revised what does the “L” in “L-function” stand for?
ref. to the answer
Jan
3
revised If $x=123456789101112131415161718$, then $x\equiv 6\pmod{16}$ and $x\equiv 0\pmod 6$
edited tags; edited title
Jan
2
revised Strehl identity for the sum of cubes of binomial coefficients
added 320 characters in body
Jan
1
revised Ramanujan Notebook Part 1 (1.16): $\sum q^{n^2} = (-q;q^2)_\infty^2(q^2;q^2)_\infty=\frac{(-q;-q)_\infty}{(q;-q)_\infty}$
descriptive title, retag
Jan
1
revised Taking seats on a plane: probability that the last two persons take their proper seats
No titles like 'a-cute-probability-problem-too-long-to-explain-in-title' _please_
Jan
1
revised Higher dimensional analogue of the correspondence between $2$d TQFTs and Frobenius algebras?
edited tags
Jan
1
revised Simple/Concise proof of Muir's Identity
edited tags
Dec
30
revised Cup Product Structure on the Projective Space
more explicit argument in the second part
Dec
30
revised Cup Product Structure on the Projective Space
edited tags
Dec
29
revised Contracting a contractible set in $\mathbb R^2$
descriptive title, tags, minor
Dec
29
revised Exact sequences and (semi) direct product
minor