Terms for subject Mathematics containing Not Known

English	Russian
a diagonally dominant dominant-like matrix is one for which it is known a priori that без артикля pivoting for stability is not required	выбор ведущего элемента
is not yet entirely known	не совсем хорошо известен
it is not known	неизвестно
it is not known with certainty	точно не известен
it is not widely known that	многие не знают, что
it is not yet known	ещё не известно
the answer to this question is not known with certainty	на этот вопрос нельзя дать определённый ответ
the domains are not known ahead of time	области предварительно неизвестны
the domains are not known ahead of time	области заранее неизвестны