At:
dfsl-properties
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1.
the_graph: Graph
2.
the_obj: GraphObject(the_graph)
3.
L: Vertices(the_graph) List
4.
L1: Vertices(the_graph) List
5.
s: traversal(the_graph)
6.
i: Vertices(the_graph)
7.
paren(Vertices(the_graph);s)
8.
no_repeats(Vertices(the_graph)+Vertices(the_graph);s)
9.
df-traversal(the_graph;s)
10.
i:Vertices(the_graph). (inl(i)
s) 
L1-the_graph- > *i
11.
(inl(i)
s)
12.
s2: traversal(the_graph)
13.
l_disjoint(Vertices(the_graph)+Vertices(the_graph);s2;s)
14.
paren(Vertices(the_graph);s2)
15.
no_repeats(Vertices(the_graph)+Vertices(the_graph);s2)
16.
(inr(i)
s2)
17.
j:Vertices(the_graph). (inr(j)
s2) 
i-the_graph- > *j
18.
i@0:Vertices(the_graph), s1,s2@0:traversal(the_graph).
(([inl(i)] @ s2 @ [inr(i)]) @ s) = (s1 @ [inr(i@0)] @ s2@0)
traversal(the_graph)

(
j:Vertices(the_graph). (inr(j)
s2@0) 
(inl(j)
s2@0) 
j-the_graph- > *i@0)
19.
i@0:Vertices(the_graph), s1,s2@0:traversal(the_graph).
(
j:Vertices(the_graph). i@0-the_graph- > *j 
non-trivial-loop(the_graph;j))

(([inl(i)] @ s2 @ [inr(i)]) @ s) = (s1 @ [inl(i@0)] @ s2@0)
traversal(the_graph)

(
j:Vertices(the_graph). i@0-the_graph- > *j 
(inr(j)
s2@0))
20.
i@0:Vertices(the_graph). L1 @ [i]-the_graph- > *i@0 
non-trivial-loop(the_graph;i@0)
21.
L1@0,L2:Vertices(the_graph) List.
L1 = (L1@0 @ L2)

(
s1,s2:traversal(the_graph).
s = (s2 @ s1)
traversal(the_graph)
& paren(Vertices(the_graph);s1) & paren(Vertices(the_graph);s2)
& (
j:Vertices(the_graph).
((inl(j)
s1) 
L1@0-the_graph- > *j)
& ((inl(j)
s2) 
L2-the_graph- > *j &
L1@0-the_graph- > *j)))
22.
L1@0: Vertices(the_graph) List
23.
L2: Vertices(the_graph) List
24.
(L1 @ [i]) = (L1@0 @ L2)
25.
e: Vertices(the_graph) List
26.
L1@0 = L1
27.
[i] = L2
28.
i:Vertices(the_graph). (inl(i)
s) 
L1-the_graph- > *i
29.
j: Vertices(the_graph)
30.
(inl(j)
s) 
L1-the_graph- > *j
31.
(inl(j)
s) 
L1-the_graph- > *j
32.
[i]-the_graph- > *j
33.
(inl(j)
s)
(([inl(i)] @ s2 @ [inr(i)]) @ s) = (nil @ [inl(i)] @ (s2 @ [inr(i)]) @ s)
traversal(the_graph)
By:
Reduce 0
Generated subgoals:
None
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