Nicholas McKibben

FIX: milp: return feasible solutions if available on time out

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#### Reference issue Closes gh-16545 #### What does this implement/fix? - returns any available and feasible solution when the HiGHS MIP solver times out #### Additional information

twixread: VD starVIBE data

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Does `twixread` support reading VD radial data? I have starVIBE raw data that I am unable to get `twixread` to handle. Could be related to #186 On latest master: ```...

BUG: IPX w/out presolve fail on easy problem

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When solve the following problem the model gets unset (presumably from an error during the course of optimization). Any insights into why it might be failing? ``` c [-1, 1]...

- resolves https://github.com/ERGO-Code/HiGHS/issues/769 and the associated SciPy issues This is a well-known 32-bit GCC floating point precision ["bug"](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=323). This PR implements a minimal fix as presented in that thread ([link](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=323#c87)...

Callbacks for linear programming solvers

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SciPy is now using the HiGHS solvers by default and planning to deprecate its legacy simplex and interior point solvers. A feature of the old solvers that would be missed...

FIX: avoid overflow on overflow check for Mac M1

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- x-ref https://github.com/scipy/scipy/pull/17432 - avoid calculating `[number]*tools::max_value()` to prevent overflows on Apple M1 processors

https://github.com/mckib2/pygrappa/blob/025ed5470187d654fa9acc23d84b68c87bbe8f33/pygrappa/radialgrappaop.py#L131

ENH: revamp cgrappa

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Need a better C++ implementation - Lack of template support locks users into `complex128` (see #79) - Not well documented - Strange bugs with hacked fixes

7T knee data R=3 breaks `cgrappa`

- Create a database of real data to make sure performance is as expected - Run against existing implementations (e.g., Gadgetron)