ZA groups with a cyclic terminal upper central factor
Weston, Kenneth (1967)
Portugaliae mathematica
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Weston, Kenneth (1967)
Portugaliae mathematica
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Abel, R.Julian R., Combe, Diana, Nelson, Adrian M., Palmer, William D. (2011)
The Electronic Journal of Combinatorics [electronic only]
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Danchev, P. (2003)
Serdica Mathematical Journal
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2000 Mathematics Subject Classification: Primary 20C07, 20K10, 20K20, 20K21; Secondary 16U60, 16S34. Let PG be the abelian modular group ring of the abelian group G over the abelian ring P with 1 and prime char P = p. In the present article,the p-primary components Up(PG) and S(PG) of the groups of units U(PG) and V(PG) are classified for some major classes of abelian groups. Suppose K is a first kind field with respect to p in char K ≠ p and A is an abelian p-group. In the...
Marta Morigi (1994)
Rendiconti del Seminario Matematico della Università di Padova
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A. Abdollahi, A. Mohammadi Hassanabadi (2004)
Rendiconti del Seminario Matematico della Università di Padova
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Kolev, Emil, Landgev, Ivan (1995)
Serdica Mathematical Journal
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In this article we explore the so-called two-dimensional tree− search problem. We prove that for integers m of the form m = (2^(st) − 1)/(2^s − 1) the rectangles A(m, n) are all tight, no matter what n is. On the other hand, we prove that there exist infinitely many integers m for which there is an infinite number of n’s such that A(m, n) is loose. Furthermore, we determine the smallest loose rectangle as well as the smallest loose square (A(181, 181)). It is still undecided whether...
Giorgio Busetto, Federico Menegazzo (1985)
Rendiconti del Seminario Matematico della Università di Padova
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László Babai (1978)
Compositio Mathematica
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Zvi Arad, Gideon Ehrlich, Otto H. Kegel, John C. Lennox (1990)
Rendiconti del Seminario Matematico della Università di Padova
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