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Theorem inner_eq_norm_add_mul_self_sub_norm_sub_mul_self_div_four

Modification history

2020-10-01 07:41
src/analysis/normed_space/real_inner_product.lean
feat(analysis/normed_space/inner_product): Define the inner product based on `is_R_or_C` (#4057)
Deleted inner_eq_norm_add_mul_self_sub_norm_sub_mul_self_div_fourView on Github →
2020-06-08 19:36
src/analysis/normed_space/real_inner_product.lean
feat(geometry/euclidean): angles and some basic lemmas (#2865) …
Added inner_eq_norm_add_mul_self_sub_norm_sub_mul_self_div_fourView on Github →