Calculus

[saravanan13]

What is meant by functional derivative?
Thanks in well advance.

[timthereaper]

Derivative of a function maybe? =)

[mathwonk]

we need more context. functional analysis is calculus on infinite dimensional spaces. maybe its a derivative in that context.

[gb7nash]

This?

http://en.wikipedia.org/wiki/Functional_derivative

Seems pretty complex.