Description: The edge function of a simple pseudograph is a one-to-one function into unordered pairs of vertices. (Contributed by Alexander van der Vekens, 10-Aug-2017) (Revised by AV, 13-Oct-2020)
Ref | Expression | ||
---|---|---|---|
Hypotheses | isuspgr.v | |
|
isuspgr.e | |
||
Assertion | uspgrf | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isuspgr.v | |
|
2 | isuspgr.e | |
|
3 | 1 2 | isuspgr | |
4 | 3 | ibi | |