findkernel

Find kernel of integral term.


Syntax
   kernel = findkernel(int_term)

Description
   kernel = findkernel(int_term, kind) is a funtion to find, in a string, 
   the kernel of an integral terms (Fredholm or Volterra).

Input
   int_term = integral term in the format 'kind(y, K(x, t))', where kind 
   is volt or fred.

Output
   kernel = kernel found.