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Jan
3
answered Encode order of playing cards (data compression)
Jan
2
answered Find this limit: $ \lim_{n \to \infty}{(e^{\frac{1}{n}} - \frac{2}{n})^n}$
Dec
19
answered Integer part of a sum (floor)
Dec
15
answered recursive sub-sequences of sequence , one is increasing and one is decreasing to same limit -> the sequence converge?
Dec
15
answered A finite sum over $\pm 1$ vectors
Nov
24
answered Irrational number inequality : $1+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}>\sqrt{3}$
Aug
5
answered Truncated alternating binomial sum
Jul
24
answered Polynomial representation
Jul
23
answered Prove that an expression is zero for all sets of distinct $a_1, \dotsc, a_n\in\mathbb{C}$
Jul
19
answered Functions with different codomain the same according to my book?
Jul
19
answered Proving that one of $a(1-b), b(1-c), c(1-a) \le \frac{1}{4}$
Jul
19
answered Difficult Integral Involving the $\ln$ function
Jul
18
answered how to solve these equation?
Jul
18
answered Bounds on a recursively defined sequence
Jul
17
answered $k$-th number in $N \times M$ Table
Jul
17
answered Sum of $k$-combination with repetitions
Jul
8
answered Fibonacci Numbers Proof
Jul
4
answered Solve $\lim_{x\to 0} \frac{\sin x-x}{x^3}$
Jul
4
answered Is my theorem correct? $f(x) \leq g(x)$ for $x\geq a$ iff $f'(x) \leq g'(x)$ for $x\geq a$ and $f(a)=g(a)$.
Jul
3
answered $\cos x -1+\frac{x^2}{2!} \geq 0$ for every $x\in \mathbb{R} $