refactor: change problem constructors to XProblem(sys, op[, tspan])
#8223
| Job | Run time |
|---|---|
| 1m 34s | |
| 1m 34s |
XProblem(sys, op[, tspan])
#8223
| Job | Run time |
|---|---|
| 1m 34s | |
| 1m 34s |