New posts in Change Of Variable

A doubt regarding change of variables in Double Integrals.

$\arctan{x}+\arctan{y}$ from integration

Why $r^{2} $ instead of $r^3$ in this change of variable?

How should I solve this integral with changing parameters?

Proof that $a\nabla^2 u = bu$ is the only homogenous second order 2D PDE unchanged/invariant by rotation

Change of variables and the partial derivative

When change of variable makes an empty interval

Distribution of $X\sqrt {2Y}$ where $X\sim N (0,1)$ and $Y\sim \operatorname{Exp} (1)$