Thanks to all developers for the new version 8.0. After testing some of my scripts with it, I think I found a bug in solve_sat together with the optional package cryptominisat (I'm aware of the upgrade of the cryptominisat package). I put an example onto CoCalc https://cocalc.com/projects/8d79787f-39ef-453c-8f0e-e9649b82c0b8/files/bug-example.sagews which shows the bug, i.e. the return value of solve_sat for this boolean equation system is "False" although a solution exists. The solver solve_sat doesn't find a solution depending on the order of the variable names given to the BooleanPolynomialRing, see the comments at the beginning of the example. With version 7.6 or 7.5 the solution of the boolean equation system is always found. That is for all the other ways of defining the variable names which are commented at the beginning of the example. I couldn't come up with a shorter example. The bug seems not so easily to be triggered.
Regards, Jörg-Volker. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
