23 citations · 23 across the 3 of their papers we have counts for
3 papers
math.CT2012
Almost split sequences and approximations
Shiping Liu, Puiman Ng, Charles Paquette
Let A be an exact category, that is, an extension-closed full subcategory of an abelian category. Firstly, we give some necessary and sufficient conditions for A to have almost spl…
math.RT2010★ 23 cited
A characterization of torsion theories in the cluster category of Dynkin type A_{\infty}
Puiman Ng
Let D be the cluster category of Dynkin type A_{\infty}. This paper provides a bijection between torsion theories in D and certain configurations of arcs connecting non-neighbourin…
math.RT2009
Existence of Auslander-Reiten sequences in subcategories
Puiman Ng
This paper studies the existence of Auslander-Reiten sequences in subcategories of mod A, where A is a finite dimensional algebra over a field. The two main theorems give necessary…