Lie Algebras 14 -- Cartan's criterion for semisimplicity

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[@ouni2022]

Thanks!
There are some videos missing in the playlist - could you please add them?

[@nathansmith2168]

The definition of nondegeneracy in the theorem statement at 5:10 is incorrect. It should be that if x is nonzero then there exists some y such that K(x,y) is nonzero.

[@milenamarquez]

@21:51 I am sure I am missing something huge, but would somebody tell me why J is a solvable ideal of I perp if it commutes with it? (J can't be a center of I perp, as J isn't contained in I perp in the first place, I and I perp being a direct sum.)

[@theelk801]

we are so back

[@kapoioBCS]

Simi 😅

[@Juniper-111]

simisimple?

[@YitzharVered]

Thumbnail much?

[@A_doe_wasting_her_life]

what does that mean

[@aug3842]

@@A_doe_wasting_her_lifeit says ‘simisimple’