Projectivities in finite -groups
Karl H. Wehrhahn (1972)
Rendiconti del Seminario Matematico della Università di Padova
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Karl H. Wehrhahn (1972)
Rendiconti del Seminario Matematico della Università di Padova
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Rendiconti del Seminario Matematico della Università di Padova
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Anne C. Morel (1968)
Colloquium Mathematicae
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László Babai (1978)
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Fred Clare (1976)
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David B. Penman, Matthew D. Wells (2014)
Acta Arithmetica
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We call a subset A of an abelian group G sum-dominant when |A+A| > |A-A|. If |A⨣A| > |A-A|, where A⨣A comprises the sums of distinct elements of A, we say A is restricted-sum-dominant. In this paper we classify the finite abelian groups according to whether or not they contain sum-dominant sets (respectively restricted-sum-dominant sets). We also consider how much larger the sumset can be than the difference set in this context. Finally, generalising work of Zhao, we provide asymptotic...