Theorem: Digraph.Walk.copy_copy (GraphProjects/DigraphConnectivity.lean)

State before:
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
u v u' v' u'' v'' : V
p : Walk G u v
hu : u = u'
hv : v = v'
hu' : u' = u''
hv' : v' = v''
⊢ Walk.copy (Walk.copy p hu hv) hu' hv' = Walk.copy p (_ : u = u'') (_ : v = v'')
Tactic:
subst_vars
State after:
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
u'' v'' : V
p : Walk G u'' v''
⊢ Walk.copy (Walk.copy p (_ : u'' = u'') (_ : v'' = v'')) (_ : u'' = u'') (_ : v'' = v'') =
    Walk.copy p (_ : u'' = u'') (_ : v'' = v'')

State before:
V : Type u
V' : Type v
V'' : Type w
G : Digraph V
G' : Digraph V'
G'' : Digraph V''
u'' v'' : V
p : Walk G u'' v''
⊢ Walk.copy (Walk.copy p (_ : u'' = u'') (_ : v'' = v'')) (_ : u'' = u'') (_ : v'' = v'') =
    Walk.copy p (_ : u'' = u'') (_ : v'' = v'')
Tactic:
rfl
State after:
no goals