Function:
Predefined Kronecker delta
Synopsis:
The unit Cartesian tensor (delta[i,j] = 1 if i=j, 0 otherwise). To be used with &t and nab(.)[i] to form general Cartesian tensor expressions.
Examples:
| > | read(femLego); |
| > | delta[1,1]; |
| > | delta[1,2]; |
| > | A[i,j] &t delta[j,k] &t b[k,n]; |