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HERMITIANS IN MATRIX ALGEBRAS WITH OPERATOR NORM – II
Glasgow Mathematical Journal ( IF 0.5 ) Pub Date : 2021-06-10 , DOI: 10.1017/s0017089521000173
JOHN DUNCAN 1 , COLIN M. McGREGOR 2
Affiliation  

. We continue our investigation of the real space H of Hermitian matrices in $${M_n}(\mathbb{C})$$ with respect to norms on $${\mathbb{C}^n}$$ . We complete the commutative case by showing that any proper real subspace of the real diagonal matrices on $${\mathbb{C}^n}$$ can appear as H. For the non-commutative case, we give a complete solution when n=3 and we provide various illustrative examples for n ≥ 4. We end with a short list of problems.

中文翻译:

具有算子范数的矩阵代数中的厄米特 – II

. 我们继续对真实空间的调查HHermitian 矩阵 $${M_n}(\mathbb{C})$$ 关于规范 $${\mathbb{C}^n}$$ . 我们通过证明实对角矩阵的任何适当实子空间来完成交换案例 $${\mathbb{C}^n}$$ 可以显示为H. 对于不可交换的情况,我们给出一个完整的解决方案n=3,我们提供了各种说明性示例n≥ 4. 我们以一个简短的问题列表结束。
更新日期:2021-06-10
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