PBW Basis of the Modified Ringel–Hall Algebra of Type <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <msub> <mrow> <mi>A</mi> </mrow> <mrow> <mi>n</mi> </mrow> </msub> </math> via Gröbner–Shirshov Basis
Journal of mathematics