Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/89426
Title: The Nine Lemma and the push forward construction for special Schreier extensions of monoids with operations
Authors: Martins-Ferreira, Nelson
Montoli, Andrea
Sobral, Manuela
Keywords: Monoids with operations; Special Schreier extension; Nine Lemma; Push forward; Baer sum
Issue Date: 2018
Publisher: Springer Verlag
Project: CMUC-UID/MAT/00324/2013 
Serial title, monograph or event: Semigroup Forum
Volume: 97
Abstract: We show that the Nine Lemma holds for special Schreier extensions of monoids with operations. This fact is used to obtain a push forward construction for special Schreier extensions with abelian kernel. This construction permits to give a functorial description of the Baer sum of such extensions.
URI: http://hdl.handle.net/10316/89426
DOI: 10.1007/s00233-018-9962-1
Rights: embargoedAccess
Appears in Collections:I&D CMUC - Artigos em Revistas Internacionais

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