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Another problem of Jónsson and McKenzie from 1982: refinement properties for connected powers of posets
Algebra universalis ( IF 0.6 ) Pub Date : 2021-07-19 , DOI: 10.1007/s00012-020-00698-y Jonathan David Farley 1
中文翻译:
1982 年 Jónsson 和 McKenzie 的另一个问题:偏序集连接幂的细化属性
更新日期:2021-07-19
Algebra universalis ( IF 0.6 ) Pub Date : 2021-07-19 , DOI: 10.1007/s00012-020-00698-y Jonathan David Farley 1
Affiliation
It is proven in this note that if non-empty posets A, B, C, and D satisfy \(A^C\cong B^D\) where C, D, and \(A^C\) are finite and connected, then there exist posets E, X, Y, and Z such that \(A\cong E^X\), \(B\cong E^Y\), \(C\cong Y\times Z\), and \(D\cong X\times Z\). This solves a problem posed by Jónsson and McKenzie in 1982.
中文翻译:
1982 年 Jónsson 和 McKenzie 的另一个问题:偏序集连接幂的细化属性
本笔记证明,如果非空位组A、B、C和D满足\(A^C\cong B^D\)其中C、D和\(A^C\)是有限且连通的,则存在偏序E、X、Y和Z使得\(A\cong E^X\)、\(B\cong E^Y\)、\(C\cong Y\times Z\)和\(D\cong X\times Z\)。这解决了 Jónsson 和 McKenzie 在 1982 年提出的问题。