# Partial Differential Classification

• February 19th 2013, 08:16 AM
Hal2001
Partial Differential Classification
$u_{x}u_{xx}+xuu_{y}=sin(y)$ in the book is classified as quasi linear

also,

$u_{x^2}+uu_{y}=1$ is classified as non-linear.

So why would the first one be quasi instead of non-linear?