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2009


November 24, 15:00
Tim Van der Linden (CMUC/Mat. FCTUC)
Remarks on two commutators



November 10, 15:00
Jirí Adámek (TU Braunschweig, Germany)
What are sifted colimits?



October 27, 15:30
Ignacio Lopez Franco (CMUC/Mat. FCTUC)
TBA



October 27, 14:30
Tim Van der Linden (CMUC/Mat. FCTUC)
Relative commutator theory and the associator of loops



September 22, 15:45
Nelson Martins-Ferreira (CDRSP/IPLeiria)
The equivalence between groupoids and crossed modules from a categorical point of view, with application in the case of groups



September 22, 14:30
Maria Manuel Clementino (CMUC/Mat. FCTUC)
Local homeomorphisms in monadic categories



July 21, 14:30
Bernhard Banaschewski (McMaster University, Canada)
On the representation of archimedean f-rings: extended versus pointfree functions



May 12, 16:00
Julia Goedecke (Centre for Mathematical Sciences, Univ. Cambridge, UK)
Satellites in semi-abelian categories



April 27, 14:30
Benjamin Steinberg (Carleton Univ., Canada)
A groupoid approach to discrete inverse semigroup algebras



February 10, 15:00
Nelson Martins-Ferreira (CDRSP/IPLeiria)
Star-multiplicative graphs in pointed protomodular categories



February 10, 14:00
Björn Gohla (Mat. FCTUC)
Categorical Groups