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Commit 2017-12-07 17:25 c32d01d7

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feat(algebra/linear_algebra): add basic theory on linear algebra

Estimated changes

added theorem constr_add
added theorem constr_basis
added theorem constr_congr
added theorem constr_eq
added theorem constr_im_eq_span
added theorem constr_mem_span
added theorem constr_neg
added theorem constr_smul
added theorem constr_sub
added theorem constr_zero
added theorem exists_is_basis
added theorem finset.smul_sum
added theorem finsupp.smul_sum
added def is_basis.constr
added theorem is_basis.eq_linear_map
added theorem is_basis.map_constr
added theorem is_basis.map_repr
added def is_basis
added theorem is_submodule_span
added theorem lc.is_linear_map_sum
added theorem lc.smul_apply
added theorem lc.sum_smul_index
added def lc
added theorem linear_eq_on
added def module_equiv_lc
added theorem repr_add
added theorem repr_eq
added theorem repr_eq_repr_of_subset
added theorem repr_eq_single
added theorem repr_eq_zero
added theorem repr_finsupp_sum
added theorem repr_neg
added theorem repr_not_span
added theorem repr_smul
added theorem repr_spec
added theorem repr_sub
added theorem repr_sum
added theorem repr_sum_eq
added theorem repr_support
added theorem repr_zero
added def span
added theorem span_empty
added theorem span_eq
added theorem span_insert
added theorem span_insert_eq_span
added theorem span_minimal
added theorem span_mono
added theorem span_singleton
added theorem span_span
added theorem span_union
added theorem subset_span