integration of a periodic function by substitution
31319
An integrable and periodic function $f(x)$ satisfies $\int_{0}^{T}f(x)dx=\int_{a}^{a+T}f(x)dx$.
21922
Elegant way of obtaining the envelope of oscillating function
141522
$f$ is T periodic and $f(x) + f'(x) \ge 0 \Rightarrow f(x) \ge 0$
130220
Why should the substitution be injective when integrating by substitution?
124677
Substitution needed for calculating an integral
39629
Indefinite integration of $\int \frac{1}{1+\sqrt{x^2+2x+2}}dx$
148914
Total Variation and indefinite integrals
72351
Applying integral substitution rule to $ \int \frac{mx+n}{ax+b} \mathrm{d}x$
152701
A question on periodicity of complex functions
47498
Integration and theorems on continuous functions
129318
Integrate via substitution and derivation rule
127712
Integration (Fourier transform)
152358
integration using residue
58013
Integral of Even and Odd functions
103485
Antiderivative of periodic function
64134
The difference between two periodic functions converges to zero, is this two functions identical?
110343
Integrating $\rm x^ae^{-bx}$.