Ge–Li–Lu–Zhou even-eigenvalue-sum conjecture

From papers

Let TX:M(n,C)M(n,C)T_X:M(n,\mathbb{C})\to M(n,\mathbb{C}) be defined by TX(Y)=[X,[X,Y]]T_X(Y)=[X^*,[X,Y]], and let λ1(TX)λN(TX)\lambda_1(T_X)\geq\cdots\geq\lambda_N(T_X) be its eigenvalues. Ge–Li–Lu–Zhou conjecture. For K=R\mathbb{K}=\mathbb{R} or K=C\mathbb{K}=\mathbb{C}, if XM(n,K)X\in M(n,\mathbb{K}) and X=1\|X\|=1, then

i=12kλi(TX)2k+2,k=1,,n22.\sum_{i=1}^{2k}\lambda_i(T_X)\leq 2k+2,\qquad k=1,\ldots,\left\lfloor\frac{n^2}{2}\right\rfloor.

This is presented as an equivalent form of the fundamental Lu–Wenzel conjecture, and the supplied text gives no independent resolution status.

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Sources & referencesView supporting material

Primary source

Jianquan Ge, Fagui Li, Zizhou Tang and Yi Zhou, “A survey on the DDVV-type inequalities”, arXiv:2402.01085 (2024).

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