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检索条件"作者=Dawoud Ahmadi Dastjerdi"
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Difference Sets of Null Density Subsets of N
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Advances in Pure Mathematics 2012年 第3期2卷 195-199页
作者: dawoud ahmadi dastjerdi Maryam Hosseini Department of Mathematics University of Guilan Rasht Iran
Let , and for any , . If is positive, then B is considered as a large set with . Its difference set has both high density and rich structure. The set with is also relatively large and it is a long standing conjecture ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Rigidity in Subclasses of Transitive and Mixing Systems
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Advances in Pure Mathematics 2012年 第6期2卷 441-445页
作者: dawoud ahmadi dastjerdi Maliheh Dabbaghian Amiri The University of Guilan Rasht Iran
We will present some restrictions for a rigidity sequence of a nontrivial topological dynamical system. For instance, any finite linear combination of a rigidity sequence by integers has upper Banach density zero. How... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Rigidity in Subclasses of Transitive and Mixing Systems
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Advances in Pure Mathematics(理论数学进展) 2012年 第6期
作者: dawoud ahmadi dastjerdi Maliheh Dabbaghian Amiri
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