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Commit 2019-03-26 18:22 a01cf868

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feat(data/multiset,data/finset): add multiset./finset.le_sum_of_additive

Estimated changes

Modified src/algebra/big_operators.lean

modified theorem finset.abs_sum_le_sum_abs

added theorem finset.le_sum_of_subadditive

Modified src/analysis/normed_space/basic.lean

modified theorem norm_triangle_sum

Modified src/data/multiset.lean

added theorem multiset.abs_sum_le_sum_abs

added theorem multiset.le_sum_of_subadditive