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Feb
7
accepted Is there any partial sums of harmonic series that is integer?
Jan
14
accepted Example of two analytic functions that differ at countably infinity many point
Nov
29
accepted Ellipse by moving center of a parametric circle equation?
Nov
12
accepted Convergence rate for $a_{n+1}=\sqrt{2 \sqrt {a_n}}$?
Nov
8
accepted Equation of 3 circles touching each other is given, what is the equation of a circle touching all 3?
Sep
25
accepted Limit of $\sum\limits_{k=1}^n \frac{1}{2k-1}-\frac12\ln n $
Sep
22
accepted Do definite Riemann integrals have a uniqe Riemann sums?
Sep
15
accepted what is mathematical description of parabola produced by intersection of two evolving circles?
Sep
13
accepted Does every integer occur finitely many times and in what positions in Pascal's triangle?
Sep
9
accepted Are Square and equilateral triangle the only convex regular ngons that can be composed to smaller versions of themselves?
Aug
11
accepted What this type of identities are called ? e.g. “expression containing no value/constant = value/constant”
Aug
3
accepted What is the symbol for primes?
Jul
16
accepted Ternary equivalence relations that are not equivalent to some binary equivalance
Jun
5
accepted what is the parametric form for “mystery curve”?
May
28
accepted n points can be equidistant from each other only in dimensions $\ge n-1$?
Apr
19
accepted How to generate complicated looking identities such as $\sqrt [3] {2 + \sqrt 5} - \sqrt [3] {2 - \sqrt 5}=1$ easily?
Jan
14
accepted How often is $1+\prod_{k=1}^n p_k$ not prime?
Dec
31
accepted What are solutions to $2^x=x$?
Dec
20
accepted Why $ \int_0^{\infty} du \, \frac{e^{-3 u} - e^{-4 u}}{u} = \int_0^{\infty} du \, \int_3^4 dt \, e^{-u t} \\ $?
Oct
8
accepted Limit $\lim_{x\to\infty} \frac {a_nx^n+a_{n-1}x^{n-1}+\cdots+a_0}{{b_nx^n+b_{n-1}x^{n-1}+\cdots+b_0}}$