infty-constructible Subsemigroups of M₂(mathbb{C})
classification
🧮 math.LO
math.RA
keywords
constructiblegivenmathbbsubsemigroupscountabledescriptionfurthermoreinfty
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A description of all subsemigroups of $M_2(\mathbb{C})$ which are given by a countable intersection of constructible sets is given. Furthermore, it is shown that they are intersections of constructible semigroups.
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