个人简述:
孙垒,男,汉族,1977年8月生,博士、副教授,数学与信息科学学院硕士生导师。
科研工作:
科研情况:
(1)2009年1月-- 2011年10月,E-保持变换半群的两个问题研究,河南省教育厅,1万(2)2011年1月-- 2013年12月,关于变换半群的自然偏序关系和组合数的研究,河南省科技厅,指导性(3)2014年1月-- 2016年12月,变换半群的富足性及相关问题研究,河南省教育厅,2万(4)2014年1月-- 2016年12月,关于变换半群的若干问题研究,河南省教育厅,2万论文情况:
[1] Lei Sun, Weina Deng and Huisheng Pei. Naturally ordered transformation semigroups preserving an equivalence and a cross-section. Algebra Colloquium, 2011, 18(3):523-532[2] Lei Sun. Combinatorial results for certain semigroups of transformations preserving orientation and a uniform partition. Bulletin of the Malaysian Mathematical Sciences Society, 2013, 36(1):179-192[3] Lei Sun and Limin Wang. Natural partial order in semigroups of transformations with invariant set. Bulletin of the Australian Mathematical Society, 2013,87(1): 94-107[4] Lei Sun. A note on abundance of certain semigroups of transformations with restricted range. Semigroup Forum, 2013, 87(3): 681-684[5] Lei Sun and Xiangjun Xin. The natural partial order on the semigroup of all transformations of a set that reflect on equivalence relation. Bulletin of the Australian Mathematical Society, 2013, 88(3):359-368[6] Lei Sun and Junling Sun. A partial order on transformation semigroups preserving double direction equivalence. Journal of Algebra and Its Applications,2013,12(8), 1350041(1-12)[7] Lei Sun and Limin Wang. Abundance of the semigroup of all transformations of a set that reflect an equivalence relation. Journal of Algebra and Its Applications,2014, 13(2): 1350088(1-5)[8] Lei Sun and Huisheng Pei. Green's relations on semigroups of transformations preserving two equivalence relations. Journal of Mathematical Research & Exposition, 2009, 29(3):415-422