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Notes on planar semimodular lattices. VIII. Congruence lattices of SPS lattices
Algebra universalis ( IF 0.6 ) Pub Date : 2020-02-22 , DOI: 10.1007/s00012-020-0641-1
G. Grätzer

In this note, I find a new property of the congruence lattice, \({{\,\mathrm{Con}\,}}L\), of an SPS lattice L (slim, planar, semimodular, where “slim” is the absence of \({\mathsf {M}}_3\) sublattices) with more than 2 elements: there are at least two dual atoms in\({{\,\mathrm{Con}\,}}L\). So the three-element chain cannot be represented as the congruence lattice of an SPS lattice, supplementing a result of G. Czédli.



中文翻译:

关于平面半模晶格的注意事项。八。SPS格的同余格

在本说明中,我找到了SPS晶格L(细长,平面,半模量,其中“细长”为的全等晶格\({{\,mathrm {Con} \,}} L \)缺少具有两个以上元素的 \({\ mathsf {M}} _ 3 \)子格):\({{\,\ mathrm {Con} \,}} L \)中至少有两个双原子。因此,三元素链不能表示为SPS晶格的全等晶格,无法补充G.Czédli的结果。

更新日期:2020-02-22
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