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https://hdl.handle.net/10316/13631| Title: | A note on two commutators | Authors: | Martins-Ferreira, Nelson Van der Linden, Tim |
Keywords: | Commutator; Internal re exive graph; Star-multiplication; Groupoid; Protomodular category; Semi-abelian category | Issue Date: | 2009 | Publisher: | Centro de Matemática da Universidade de Coimbra | Citation: | Pré-Publicações DMUC. 09-47 (2009) | Serial title, monograph or event: | Pré-Publicações DMUC | Issue: | 09-47 | Place of publication or event: | Coimbra | Abstract: | We show that two known conditions which naturally arose in commutator theory and in the theory of internal crossed modules coincide: every starmultiplicative graph is multiplicative if and only if every two e ective equivalence relations commute as soon as so do their normalisations. This answers a question asked by George Janelidze. | URI: | https://hdl.handle.net/10316/13631 | Rights: | openAccess |
| Appears in Collections: | FCTUC Matemática - Vários |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| A note on two commutators.pdf | 218.77 kB | Adobe PDF | View/Open |
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