The kernel function is defined as a summation of exponential functions.
g(t)=i=1∑nmiexp(−sit)
The parameters mi and si are complex numbers.
Syntax
material Nonviscous01 (1) ((2) (3) (4) (5)...)
# (1) int, unique material tag
# (2) double, real part of `m_i`
# (3) double, imaginary part of `m_i`
# (4) double, real part of `s_i`
# (5) double, imaginary part of `s_i`
Example
material Nonviscous01 2 8. 0 2. 0 4. 0 1. 0
This defines a kernel function of the following form.