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visits member for 3 years, 11 months
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Jan
9
revised Is there any mathematical or physical situations that $1+2+3+\ldots\infty=-\frac{1}{12}$ shows itself?
edited tags
Jan
9
revised Finding the limit of $\left(\dfrac{a^\frac{1}{n}+b^\frac{1}{n}+c^\frac{1}{n}}{3}\right)^n$
descriptive title
Jan
8
revised There exists a power of 2 such that the last five digits are all 3's or 6's. Find the last 5 digits of this number
descriptive title
Jan
6
revised Fundamental group of projective plane is $C_{2}$???
edited tags
Jan
6
revised Question about a nested radical identity of Ramanujan involving $\sqrt 5$
edited tags
Jan
6
revised Infinite radical. How to show it converges to three?
edited tags
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_