chore(algebra/order/ring): fix name, add a missing lemma #10392
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* fix left/right in `mul_nonneg_iff_right_nonneg_of_pos`; * add `mul_nonneg_iff_left_nonneg_of_pos` (equivalent to the old `mul_nonneg_iff_right_nonneg_of_pos`).
urkud
added
easy
|
It's a part of #10365 |
YaelDillies
removed
awaiting-review
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mul_nonneg_iff_right_nonneg_of_pos;mul_nonneg_iff_left_nonneg_of_pos(equivalent to the oldmul_nonneg_iff_right_nonneg_of_pos).