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Commit 2021-09-30 22:39 a24b4965

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feat(analysis/normed_space/add_torsor_bases): add lemma exists_subset_affine_independent_span_eq_top_of_open (#9418) Also some supporting lemmas about affine span, affine independence.

Estimated changes

Created src/analysis/normed_space/add_torsor_bases.lean

added theorem exists_subset_affine_independent_span_eq_top_of_open

Modified src/data/finset/basic.lean

added theorem finset.sdiff_singleton_not_mem_eq_self

Modified src/linear_algebra/affine_space/combination.lean

added theorem affine_span_eq_affine_span_line_map_units

added theorem finset.weighted_vsub_of_point_eq_of_weights_eq

modified theorem finset.weighted_vsub_of_point_insert

added theorem mem_affine_span_iff_eq_weighted_vsub_of_point_vadd

Modified src/linear_algebra/affine_space/independent.lean

added theorem affine_independent.units_line_map