How to Evaluate $\int _0^{\infty} \lfloor x \rfloor e^{-x} dx$?
87273
Evaluate the integral $\int_0^{\infty} \lfloor x \rfloor e^{-x}\mathrm dx$
146023
How to prove that $x^2 - \lfloor x\rfloor^2$ is onto?
33155
Use residues to evaluate $\int_0^\infty \frac{\cosh(ax)}{\cosh(x)}\,\mathrm{d}x$, where $|a|<1$
105860
Evaluate the limit of $(n+1)\int_0^1x^n\ln(1+x)\,dx$ when $n\to\infty$
94395
Integral: $\int_{-\infty}^{\infty} x^2 e^{-x^2}\mathrm dx$
57224
Compute $\int_0^\infty \frac{dx}{1+x^3}$
102486
Simplifying $\sum_{i=1}^n{\lfloor \frac{n}{i} \rfloor}$?
75423
Computing $\int_0^\infty\frac{1}{(1+x^{2015})(1+x^2)}$
4225
How to calculate $\int\limits_{-\infty}^\infty\frac{e^{ix}}{x}dx$
30639
Efficient computation of $\sum_{k=1}^n \left\lfloor \frac{n}{k}\right\rfloor$
41840
How do I evaluate this sum(involving the floor function)?
68319
How can I evaluate $\int_{-\infty}^{\infty} e^{-x^2} dx$ without using polar coordinates
82803
Prove that $\lfloor\lfloor x/2 \rfloor / 2 \rfloor = \lfloor x/4 \rfloor$
114195
Evaluating $\int_0^\infty \frac{\log (1+x)}{1+x^2}dx$
89028
Evaluate the integral $\int e^{-x}x^n dx$
156531
Evaluating the integral $\int_{-\infty}^\infty \frac{\sin^2(x)}{x^2}e^{i t x} dx$
5914
Proving $\lfloor 2x \rfloor = \lfloor x \rfloor + \lfloor x+0.5\rfloor$