Bourbaki

Remark 2

Tag 00Y4, permanent. Cite it as [Bourbaki, Tag 00Y4].

Lie Groups and Lie Algebras, chapter VIII, § 1. The Lie algebra sl(2, k) and its representations

For n≥0n\geq 0 and m>nm > n,

X−en(m)=−(m−n)(m)um−n−1vn+1=−(n+1)en+1(m) X_-e^{(m)}_n=-(m-n)(m)u^{m-n-1}v^{n+1}=-(n+ 1)e^{(m)}_{n+1}
n n

Hence, (e0(m),e1(m),...,em(m))(e_0^{(m)}, e_1^{(m)}, . . . , e_m^{(m)}) is the basis of V(m)V(m) associated to the primitive element e0(m)e_0^{(m)}.

Bourbaki sets the proof directly after the statement, and the corpus does not separate them, so what is above is the statement and its proof together.

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Cites

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Transcribed from the printed volume. Not translated.