optimize.Bounds - does lb need to be less than ub?

Hi all,
in https://github.com/scipy/scipy/pull/18483 `Bounds` is being modified
slightly.

Currently there's a check in there:

```
if (self.lb > self.ub).any():
    raise ValueError("An upper bound is less than the corresponding lower
bound.")
```

I would personally find it useful if Bounds was more robust in this area,
and was able to deal with lb entries that were greater than the ub. I would
like Bounds to have a clear up code with something like:

```
_lb = np.minimum(self.lb, self.ub)
_ub = np.maximum(self.lb, self.ub)
self.lb = _lb
self.ub = _ub
```

What are peoples thoughts on this?

A.


_____________________________________
Dr. Andrew Nelson


_____________________________________

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