论文标题
在$ q $ - 强制延期和$ q $ - 强调提升
On $q$-commuting co-extensions and $q$-commutant lifting
论文作者
论文摘要
考虑一个非零收缩$ t $和一个有限的操作员$ x $满足$ tx = qxt $的复杂数字$ q $。关于$ q $的扩张和$ q $ - 同意$(t,x)$时,有一些有趣的结果,当$ | q | = 1 $时,有一些有趣的结果。在这里,我们将其中的一些改进到Scalars $ Q $满足$ | Q | \ leq \ dfrac {1} {\ | t \ |} $的类别中。
Consider a nonzero contraction $T$ and a bounded operator $X$ satisfying $TX=qXT$ for a complex number $q$. There are some interesting results in the literature on $q$-commuting dilation and $q$-commutant lifting of such pair $(T,X)$ when $|q|=1$. Here we improve a few of them to the class of scalars $q$ satisfying $|q|\leq \dfrac{1}{\|T\|}$.