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幺半群上的Rees矩阵半群的半格的结构 总被引:1,自引:0,他引:1
曹永林 《纯粹数学与应用数学》1998,14(2):28-32
推广了M.Petrich在文「1」中所用的方法,得到了幺半群上Rees矩阵半群的半格的一个结构定理,研究了单幂幺半群Rees矩阵半群的半格的性质并给出了矩形单幂幺半群的半格的若干等价刻划。 相似文献
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半群上Rees矩阵半群的半格的结构 总被引:1,自引:0,他引:1
曹永林 《纯粹数学与应用数学》1998,(2)
推广了M.Petrich在文[1]中所用的方法,得到了幺半群上Rees矩阵半群的半格的一个结构定理.研究了单幂幺半群上Rees矩阵半群的半格的性质并给出了矩形单幂幺半群的半格的若干等价刻划. 相似文献
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左C—半群的又一结构 总被引:10,自引:0,他引:10
作为Clifford半群的推广的左Clifford半群(左C-半群)已有一ζ-积结构,本文给出了左C-半群的另一结构,所谓△-积结构,它的一个特殊性形恰好为左群的强半格。这一新结构为半群的Clifford层次的研究伸展到拟正则半群领域奠定了基础。 相似文献
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关于弱交换PO—半群 总被引:1,自引:1,他引:0
在本文中我们引入弱交换PO-半群的概念,并研究这类半群到其Archimedes子半群的半格分解,给出这类半群似于无序半群的相应结果的一个刻画。作为推论,我们得到弱交换POe-群和无序半群的相应刻画。 相似文献
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π-逆半群是广义正则半群,研究它的π-逆子半群格是非常自然的.本文首先讨论了一个π-逆半群的π逆子半群格的直积分解;然后通过引进πU-链的概念刻划了π-逆子半群格是模格的π-逆半群的性质及特征. 相似文献
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Hugh Thomas 《Order》2006,23(2-3):249-269
In this paper, we study lattices that posess both the properties of being extremal (in the sense of Markowsky) and of being left modular (in the sense of Blass and Sagan). We call such lattices trim and show that they posess some additional appealing properties, analogous to those of a distributive lattice. For example, trimness is preserved under taking intervals and suitable sublattices. Trim lattices satisfy a weakened form of modularity. The order complex of a trim lattice is contractible or homotopic to a sphere; the latter holds exactly if the maximum element of the lattice is a join of atoms. Any distributive lattice is trim, but trim lattices need not be graded. The main example of ungraded trim lattices are the Tamari lattices and generalizations of them. We show that the Cambrian lattices in types A and B defined by Reading are trim; we conjecture that all Cambrian lattices are trim. 相似文献
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O. A. Kuryleva 《Algebra and Logic》2008,47(1):42-48
A vector space V over a real field R is a lattice under some partial order, which is referred to as a vector lattice if u + (v ∨ w) = (u + v) ∨ (u + w) and u
+ (v ∧ w) = (u + v) ∧ (u + w) for all u, v, w ∈ V. It is proved that a model N of positive integers with addition and multiplications is relatively elementarily interpreted in the ideal lattice
ℱ
n
of a free vector lattice ℱ
n
on a set of n generators. This, in view of the fact that an elementary theory for N is hereditarily undecidable, implies that an elementary theory for
ℱ
n
is also hereditarily undecidable.
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Translated from Algebra i Logika, Vol. 47, No. 1, pp. 71–82, January–February, 2008. 相似文献
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明平华 《数学的实践与认识》2004,34(6):159-161
由幂格的定义知 ,幂格与幂集格是不同的 ,然而它们却有一定的联系 .本文在幂格概念的基础上 ,进一步地讨论幂格和幂集格在一定条件下的联系 . 相似文献
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幂格的同态与同余关系 总被引:1,自引:1,他引:0
本文在文[1]已引入幂格同态概念的基础上,进一步引入幂格同余关系的概念,并得到它们的一些相关性质.以及幂格同态与幂格同余关系的对应关系. 相似文献
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M. V. Semenova 《Algebra and Logic》2006,45(2):124-133
V. B. Repnitskii showed that any lattice embeds in some subsemilattice lattice. In his proof, use was made of a result by
D. Bredikhin and B. Schein, stating that any lattice embeds in the suborder lattice of a suitable partial order. We present
a direct proof of Repnitskii’s result, which is independent of Bredikhin—Schein’s, giving the answer to a question posed by
L. N. Shevrin and A. J. Ovsyannikov. We also show that a finite lattice is lower bounded iff it is isomorphic to the lattice
of subsemilattices of a finite semilattice that are closed under a distributive quasiorder.
Supported by INTAS grant No. 03-51-4110; RF Ministry of Education grant No. E02-1.0-32; Council for Grants (under RF President)
and State Aid of Fundamental Science Schools, project NSh-2112.2003.1; a grant from the Russian Science Support Foundation;
SB RAS Young Researchers Support project No. 11.
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Translated from Algebra i Logika, Vol. 45, No. 2, pp. 215–230, March–April, 2006. 相似文献
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