Re-writing $f(x, y)$ as $g(x)h(y)$
71410
How can I separate a separable function
24126
When functions commute under composition
11828
continuous functions on $\mathbb R$ such that $g(x+y)=g(x)g(y)$
151297
Second order partial of $f(x,y)=\frac{xy(x^2-y^2)}{x^2+y^2}$
141643
Showing $\rho (x,y)=\frac{d(x,y)}{1+d(x,y)}$ is a metric
137983
Normalisation of $k[x,y]/(y^2-x^2(x-1))$
78753
$f(x,y)=4x^3y^2$ Dealing with Directional Derivatives and Vectors
37122
Modifying some features on the graphs of a function and its inverse
14830
A transformation of F[x]
115466
How make f[{x,y}] evaluate as f[x,y]?
68409
Consider $f(x,y)=\sup_{θ,φ}\{||e^{i θ }x+ e^{i φ }y||^2: θ,φ∈R\}$ in which $x,y\in\mathbb C^n$
135046
Can this quick way of showing that $K[X,Y]/(Y-X^2)\cong K[X]$ be turned into a valid argument?
40603
Transform a list of functions to a composition
10747
Given function $g$ continuous in line $[0,\infty)$...
56413
$f(g(x))=g(f(x))$ implies $f(c)=g(c)$ for some $c$
120960
$f,g$ such that $\int fg = \int f \int g$
64866
Proving a Composition of Functions is Bijective