New posts in functions

What is the difference between a kernel and a function?

functions definition

what is the integral of $\int x\cos^2(\pi x)$

integration functions trigonometry definite-integrals trigonometric-integrals

Proving that if $|f''(x)| \le A$ then $|f'(x)| \le A/2$

real-analysis functions derivatives uniform-continuity

Showing $\lim_{(x,y) \to (0,0)} \sin (xy) / xy = 1$

calculus limits functions

Is this a valid proof of $f(S \cap T) \subseteq f(S) \cap f(T)$?

functions elementary-set-theory discrete-mathematics

Simple way to understand what derivative is

calculus functions

Prove that $\frac{e^x-1}{x}$ is bijective

real-analysis functions exponential-function

Find all functions $f: \mathbb{R} \rightarrow \mathbb {R}$ such that $f(x+y)+f(x-y)=2f(x)\cos y$ [duplicate]

functions trigonometry functional-equations

Two variable functional equation: $f(x+y)+f(x-y)=2f(x)\cos y$ [duplicate]

functions trigonometry functional-equations

Trying to solve $\frac{f(x) f(y) - f(xy)}{3} = x + y + 2$ for $f(x)$

algebra-precalculus functions functional-equations

Finding $f(36)$ given $\frac{f(x)f(y)-f(xy)}{3} = x+y+2$ on $\mathbb R$ [duplicate]

number of solutions of $f(f(f(f(x))))$

functions contest-math quadratics

Name for $(1-x)$?

functions terminology

indefinite article before I(0)

indefinite-articles symbols functions

Why are vector valued functions 'well-defined' when multivalued functions aren't?

functions multivalued-functions

Proving Functions are Surjective

functions elementary-set-theory

Why is $\sin : \mathbb{R} \to [-5,5] $ different from $\sin : \mathbb{R} \to \mathbb{R}$? [duplicate]

Reflect a point without matrix math

matrices functions linear-transformations transformation desmos

Is there any way to integrate $\frac1{f(x)}$ in terms of the integral of $f(x)$?

calculus integration functions

Is f(x) = x smooth?