oriented cycle造句

例句与造句

1. 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
2. It's difficult to find oriented cycle in a sentence. 用oriented cycle造句挺难的