Maple 13

1.how to plot a equation include two complex variables?

e.g.,0.1501071588582623569e-19 * s1 ^ 2 - 0.1770422954406499377e-11 * s1 ^ 2 * s2 ^ 2 + 0.1526369514180028298e-19 * s2 ^ 2 - 0.8979700309848614490e-12 * s1 ^ 4 - 0.9507487955845430138e-12 * s2 ^ 4 + 0.4941234607542336257e-4 * s1 ^ 4 * s2 ^ 2 + 0.5029096170369867504e-4 * s1 ^ 2 * s2 ^ 4 + 0.1631266049971375518e-4 * s1 ^ 6 + 0.1557291987414385136e-4 * s2 ^ 6 - 0.3925287034197085366e3 * s1 ^ 6 * s2 ^ 2 - 0.5855115617172747465e3 * s1 ^ 4 * s2 ^ 4 - 0.3629622668517714814e3 * s1 ^ 2 * s2 ^ 6 - 0.9104265485940048070e2 * s1 ^ 8 - 0.7659521348220225467e2 * s2 ^ 8
s1 and s2 are complex variables, their real parts and imag parts interval are [0..1e-3]. And more, three complex variables?

2.how to solve and plot the integration of a recursion function?

e.g., define a periodic function like this:

```g := x -> piecewise(0 <= x and x < 1, x,
1 <= x and x < 2, 1,
2 <= x and x < 3, 3-x,
3 <= x, g(x-3)):
```

plot this function is easy, use this command plot('g(x)',x=0..10);

but when solve its integration as a equation, eg:fsolve(int('g(x)',x=0..t)=5,t) or plot it, plot(int('g(x)',x=0..t),t=0..5) consume a long time to go. More over, it can be used for the fourier series expansion?