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Commit 2021-12-06 22:38 eec4b70c

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feat(algebra/geom_sum): criteria for 0 < geom_sum (#10567)

Estimated changes

Modified src/algebra/geom_sum.lean

modified def geom_sum

added theorem geom_sum_alternating_of_lt_neg_one

modified theorem geom_sum_def

added theorem geom_sum_eq_zero_iff_neg_one

added theorem geom_sum_neg_iff

modified theorem geom_sum_one

added theorem geom_sum_pos

added theorem geom_sum_pos_and_lt_one

added theorem geom_sum_pos_iff

added theorem geom_sum_pos_of_odd

added theorem geom_sum_succ'

added theorem geom_sum_succ

added theorem geom_sum_two

modified theorem geom_sum_zero

modified def geom_sum₂

modified theorem geom_sum₂_def

modified theorem geom_sum₂_one

modified theorem geom_sum₂_with_one

modified theorem geom_sum₂_zero

added theorem neg_one_geom_sum

modified theorem one_geom_sum

modified theorem op_geom_sum

modified theorem op_geom_sum₂

added theorem zero_geom_sum

Modified src/logic/basic.lean

added theorem and_or_imp

added theorem decidable.and_or_imp