Projectivities of free products
Charles S. Holmes (1969)
Rendiconti del Seminario Matematico della Università di Padova
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Charles S. Holmes (1969)
Rendiconti del Seminario Matematico della Università di Padova
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Tieudjo, D. (2005)
International Journal of Mathematics and Mathematical Sciences
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Paul Eklof (1974)
Fundamenta Mathematicae
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Wong, Peng Choon, Gan, Hui Woan (1999)
Bulletin of the Malaysian Mathematical Society. Second Series
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Firat Ates, A. Sinan Çevik (2009)
Rendiconti del Seminario Matematico della Università di Padova
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Firat Ateş, A. Sinan Çevik (2007)
Mathematica Slovaca
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Tieudjo, D., Moldavanskii, D.I. (2010)
International Journal of Mathematics and Mathematical Sciences
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Leo P. jr. Comerford, B. Truffault (1976)
Mathematische Zeitschrift
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Duncan W. Parkes, V. Yu. Shavrukov, Richard M. Thomas (2010)
RAIRO - Theoretical Informatics and Applications
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We show that the class of groups which have monoid presentations by means of finite special [λ]-confluent string-rewriting systems strictly contains the class of plain groups (the groups which are free products of a finitely generated free group and finitely many finite groups), and that any group which has an infinite cyclic central subgroup can be presented by such a string-rewriting system if and only if it is the direct product of an infinite cyclic group and a finite cyclic group. ...