Description: A vertex in a graph (simple pseudograph) with one edge which is a loop (see uspgr1v1eop ). (Contributed by AV, 17-Dec-2020)
Ref | Expression | ||
---|---|---|---|
Hypothesis | uspgrloopvtx.g | ||
Assertion | uspgrloopvtxel |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uspgrloopvtx.g | ||
2 | 1 | uspgrloopvtx | |
3 | eleq2 | ||
4 | 3 | biimpd | |
5 | 4 | eqcoms | |
6 | 5 | com12 | |
7 | 2 6 | mpan9 |