Perfect numbers and finite groups
Tom De Medts, Attila Maróti (2013)
Rendiconti del Seminario Matematico della Università di Padova
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Displaying similar documents to “On overgroups of and in their minimal representations.”
Perfect numbers and finite groups
Induced representations and classification for and
Paul J.jun. Sally, Marko Tadic (1993)
Mémoires de la Société Mathématique de France
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Irreducibility of some representations of the groups of symplectomorphisms and contactomorphisms
Łukasz Garncarek (2014)
Colloquium Mathematicae
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We show the irreducibility of some unitary representations of the group of symplectomorphisms and the group of contactomorphisms.
Counting perfect matchings in polyominoes with an application to the dimer problem
P. John, H. Sachs, H. Zernitz (1987)
Applicationes Mathematicae
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Factor representations of diffeomorphism groups
Robert P. Boyer (2003)
Studia Mathematica
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We give a new construction of semifinite factor representations of the diffeomorphism group of euclidean space. These representations are in canonical correspondence with the finite factor representations of the inductive limit unitary group. Hence, many of these representations are given in terms of quasi-free representations of the canonical commutation and anti-commutation relations. To establish this correspondence requires a generalization of complete positivity as developed in...
C-closed functions
G. L. Garg, B. Kumar (1989)
Matematički Vesnik
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Construction of the fourfold cover of the Mathieu group .
Suleiman, Ibrahim A.I., Wilson, Robert A. (1993)
Experimental Mathematics
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A Unified Theory of Perfect and Related Functions
M. N. Mukherjee, S. Raychaudhuri (1993)
Matematički Vesnik
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The number of 1-factors in some polyhexes.
Tošić, Ratko, Vojvodić, Dušan (2000)
Novi Sad Journal of Mathematics
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Reciprocity theorems in the theory of representations of groups
A. Strasburger, A. Wawrzyńczyk (1972)
Studia Mathematica
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On near-perfect and deficient-perfect numbers
Min Tang, Xiao-Zhi Ren, Meng Li (2013)
Colloquium Mathematicae
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For a positive integer n, let σ(n) denote the sum of the positive divisors of n. Let d be a proper divisor of n. We call n a near-perfect number if σ(n) = 2n + d, and a deficient-perfect number if σ(n) = 2n - d. We show that there is no odd near-perfect number with three distinct prime divisors and determine all deficient-perfect numbers with at most two distinct prime factors.
W-perfect groups
Selami Ercan (2015)
Open Mathematics
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In the present article we define W-paths of elements in a W-perfect group as a useful tools and obtain their basic properties.