The Differential Equation $\frac { \partial ^ { 2 } u } { \partial x ^ { 2 } } - \frac { \partial u } { \partial t } = u$

Multiple Choice

The differential equation $\frac { \partial ^ { 2 } u } { \partial x ^ { 2 } } - \frac { \partial u } { \partial t } = u$ is Select all that apply.

A) nonlinear
B) linear
C) hyperbolic
D) elliptic
E) parabolic