A PROPER COVER ON A RIGHT TYPE B SEMIGROUP
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摘要: 给出了右型B半群真覆盖的定义. 证明了相应于一右型B半群的任意真覆盖为作用于左消去幺半群上的相应于该右型B半群的真覆盖,并给出了相应于右型B半群的真覆盖的结构定理.Abstract: The concept of a proper cover of a right type B semigroup is introduced. Furthermore, it is proved that any proper cover for a right type B semigroup is a proper cover over a left cancellative monoid.A structure theorem of proper covers for a right type B semigroup is also given.
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Keywords:
- right type B semigroups /
- proper covers /
- left cancellative monoids
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