you have to be careful of sign changes when multiplying inequalities from both sides: x≤y doesn't mean -x≤-y holds.
you have to be careful of sign changes when multiplying inequalities from both sides: x≤y doesn't mean -x≤-y holds.
you can compare the dates between that post and mine bsky.app/profile/ronw...
you can compare the dates between that post and mine bsky.app/profile/ronw...
座標軸もヒルベルト迷路も素敵でした!🥰
座標軸もヒルベルト迷路も素敵でした!🥰