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Theorem open_ball_subset_open_ball_of_le

Modification history

2018-01-19 16:18
analysis/metric_space.lean
feat(data/real,*): supporting material for metric spaces
Deleted open_ball_subset_open_ball_of_leView on Github →
2017-09-03 20:55
topology/metric_space.lean
refactor(logic/basic): refactor logic theorems
Modified open_ball_subset_open_ball_of_leView on Github →
2017-08-26 15:40
topology/metric_space.lean
feat(topology): port metric space from lean2
Added open_ball_subset_open_ball_of_leView on Github →