Title of article
Simply connected incidence algebras Original Research Article
Author/Authors
I. Assem، نويسنده , , M.I. Platzeck، نويسنده , , M.J. Redondo، نويسنده , , S. Trepode، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
23
From page
333
To page
355
Abstract
It is known that the incidence algebra of a finite poset is not strongly simply connected if and only if its quiver contains a crown. We give a combinatorial condition on crowns which, if satisfied, forces the incidence algebra to be simply connected. The converse is not true, but we show that a simply connected incidence algebra which is not strongly simply connected always contains crowns satisfying this condition.
Keywords
Simply connected incidence algebras and simplicial complexes , Fundamental groups , Crowns
Journal title
Discrete Mathematics
Serial Year
2003
Journal title
Discrete Mathematics
Record number
949225
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