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Theorem continuous_within_at.preimage_mem_nhds_within

Modification history

2019-10-08 13:51
src/topology/continuous_on.lean
refactor(topology/continuous_on): move continuous_{on,within_at} to own file (#1516) …
Modified continuous_within_at.preimage_mem_nhds_withinView on Github →
2019-06-20 08:30
src/topology/order.lean
feat(topology/order): more facts on continuous_on (#1140)
Added continuous_within_at.preimage_mem_nhds_withinView on Github →