kalmarek e223763b75 add check_pm function to test against zeros; ... Since we can not throw from a thread, after introduction of Threading into create_pm doesn't warn user on the possible not supported product. Indeed threading quits immediately after first error is thrown, leaving the pm matrix under-populated; we check on zeros and warn the user on the situation;		2017-09-10 21:41:36 +02:00
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GroupRings.jl	add check_pm function to test against zeros;	2017-09-10 21:41:36 +02:00