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Theorem ne_neg_of_mem_sphere

Modification history

2022-06-25 20:02
src/analysis/normed_space/ball_action.lean
feat(analysis/normed*): add instances about balls and spheres (#14808) …
Modified ne_neg_of_mem_sphereView on Github →
2022-01-26 13:29
src/analysis/normed_space/basic.lean
feat(analysis/seminorm): The norm as a seminorm, balanced and absorbent lemmas (#11487) …
Modified ne_neg_of_mem_sphereView on Github →
2021-01-03 14:06
src/analysis/normed_space/basic.lean
feat(analysis/normed_space/basic): basic facts about the sphere (#5590) …
Added ne_neg_of_mem_sphereView on Github →