例句與造句

1. For a finite quiver ? ( a quiver with finitely many vertices and edges ), let " K " ? be its path algebra.
2. If the quiver has finitely many vertices and arrows, and the end vertex and starting vertex of any path are always distinct ( i . e . " Q " has no oriented cycles ), then " K " ? is a finite-dimensional hereditary algebra over " K " and conversely any such finite-dimensional hereditary algebra over " K " is isomorphic to the path algebra over its Ext quiver
3. It's difficult to find path algebra in a sentence. 用path algebra造句挺難的