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When `tot` at `Cobyla.cs:962` is very small, this line evaluates to `temp = 0.0`. This causes line 963 to divide by zero, evaluating to `alpha = NaN`. This eventually causes both step and stepful to b…
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Dear csnumrics maintainers,
This is Dr. Zaikun Zhang from the Hong Kong Polytechnic University. Together with Professor [N.I.M. Gould](https://www.numerical.rl.ac.uk/people/nimg/), I am responsible…
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Dear maintainers of Elmer FEM,
This is Dr. Zaikun Zhang from the Hong Kong Polytechnic University. Together with Professor [N.I.M. Gould](https://www.numerical.rl.ac.uk/people/nimg/), I am responsi…
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Dear NLopt maintainers,
This is Dr. Zaikun Zhang from the Hong Kong Polytechnic University. Together with Professor [N.I.M. Gould](https://www.numerical.rl.ac.uk/people/nimg/), I am responsible for…
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Dear lme4 maintainers
This is Dr. Zaikun Zhang from The Hong Kong Polytechnic University. Together with Professor [N.I.M. Gould](https://www.numerical.rl.ac.uk/people/nimg/), I am responsible for m…
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This is a 2d toy problem with no feasible region within the constraints (x-y > 0 and -1 > x - y; reported as a bug in scipy here
https://github.com/scipy/scipy/issues/7618 )
Using the R interface…
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When `tot` at `Cobyla.java:879` is very small, this line evaluates to `temp = 0.0`. This causes line 880 to divide by zero, evaluating to `alpha = NaN`. This eventually causes both `step` and `stepful…
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When increasing the maximum reel-in speed from 8 m/s to 12 m/s, the optimisation fails to find the correct minimum for the reel-in factor when it enters wind-speed-regime 2 and then successfully finds…
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### Is your feature request related to a problem? Please describe.
Dear SciPy maintainers,
This is Dr. Zaikun Zhang from the Hong Kong Polytechnic University. Together with Professor [N.I.M. Gou…
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While working on updating the [`python-cyipopt` package](https://src.fedoraproject.org/rpms/python-cyipopt) in Fedora Linux to 1.3.0, I observed consistent failures of of `test_minimize_ipopt_jac_with…