Alexander matrix

In mathematics, an Alexander matrix is a presentation matrix for the Alexander invariant of a knot. The determinant of an Alexander matrix is the Alexander polynomial for the knot.{{cite web|last=Collins|first=Julia|title=Knot Theory|url=http://www.maths.ed.ac.uk/~jcollins/Knot_Theory.pdf|accessdate=21 September 2013|archive-url=https://web.archive.org/web/20130921080732/http://www.maths.ed.ac.uk/~jcollins/Knot_Theory.pdf|archive-date=2013-09-21|url-status=dead}}