Commit 2021-07-22 07:37 c9593dcc

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feat(algebra/lie/direct_sum): define direct_sum.lie_of, direct_sum.to_lie_algebra, direct_sum.lie_algebra_is_internal (#8369) Various other minor improvements.

Estimated changes

Modified src/algebra/lie/direct_sum.lean

modified def direct_sum.lie_algebra_component

added theorem direct_sum.lie_algebra_ext

added def direct_sum.lie_algebra_is_internal

modified def direct_sum.lie_algebra_of

added theorem direct_sum.lie_of

added theorem direct_sum.lie_of_of_eq

added theorem direct_sum.lie_of_of_ne

added def direct_sum.to_lie_algebra

Modified src/linear_algebra/direct_sum_module.lean

added theorem direct_sum.coe_to_module_eq_coe_to_add_monoid