Commit 2021-07-17 16:55 3782c193

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feat(topology/algebra/ordered): add nhds_top_basis_Ici and nhds_bot_basis_Iic (#8349) Also add ennreal.nhds_zero_basis_Iic and ennreal.supr_div.

Estimated changes

Modified src/topology/algebra/ordered/basic.lean

added theorem nhds_bot_basis_Iic

added theorem nhds_top_basis_Ici

Modified src/topology/instances/ennreal.lean

added theorem ennreal.nhds_zero_basis_Iic

added theorem ennreal.supr_div