科研之友
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摘要
The monoid of extensive transformations of a chain of order four is shown to be finitely based and a finite basis for this monoid is given. This completes the description of the equational property of the monoids of all full extensive transformations, partial extensive transformations, and partial order-preserving extensive transformations over any finite chain.
- 出版日期2010-9
- 单位兰州大学
