Hi,

can you help me please to resolve this question.

I(x,t) is the solution of an variational solution system.

To find I(x,t) we use

```
for (real t=0;t<T;t+=dt) {
system,
}
```

After this, how we can resolve the equation I(x,t)=0.5 for all t: we denote the solution x=x(t), and after this we calculate c(t)=x’(t) for all t.

Thank’s in advance .