Database
GRAPH THEORY
Vertices and edges
Vertices and indexed edges
The vertices and edges of a graph represented as ordered pair
opiedgfvi
Metamath Proof Explorer
Description: The set of indexed edges of a graph represented as an ordered pair of
vertices and indexed edges as function value. (Contributed by AV , 4-Mar-2021)
Ref
Expression
Hypotheses
opvtxfvi.v
⊢ V ∈ V
opvtxfvi.e
⊢ E ∈ V
Assertion
opiedgfvi
⊢ iEdg ⁡ V E = E
Proof
Step
Hyp
Ref
Expression
1
opvtxfvi.v
⊢ V ∈ V
2
opvtxfvi.e
⊢ E ∈ V
3
opiedgfv
⊢ V ∈ V ∧ E ∈ V → iEdg ⁡ V E = E
4
1 2 3
mp2an
⊢ iEdg ⁡ V E = E