No vertices: Directed graph with loops and multi-edges, order 0: ( 0 ) ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) Directed graph with loops and multi-edges, order 1, ignoring direction: ( 0 1 2 ) ( 1 0 3 ) ( 2 0 3 ) ( 3 1 2 4 ) ( 4 3 ) ( 5 ) Directed graph with loops and multi-edges, order 1, only checking IGRAPH_IN: ( 0 2 ) ( 1 0 ) ( 2 0 ) ( 3 1 2 ) ( 4 3 ) ( 5 ) Directed graph with loops and multi-edges, order 10, ignoring direction: ( 0 1 2 3 4 ) ( 1 0 3 2 4 ) ( 2 0 3 1 4 ) ( 3 1 2 4 0 ) ( 4 3 1 2 0 ) ( 5 ) Directed graph with loops and multi-edges, order 2, mindist 2, IGRAPH_OUT: ( 3 ) ( 4 ) ( 1 4 ) ( ) ( ) ( ) Directed graph with loops and multi-edges, order 4, mindist 4, IGRAPH_ALL: ( ) ( ) ( ) ( ) ( ) ( ) Negative order. Negative mindist.