(22steps total)
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At:
dfs
induction
1
1
2
2
1.
the_graph:
Graph
2.
the_obj:
GraphObject(the_graph)
3.
P:
Vertices(the_graph)
traversal(the_graph)
traversal(the_graph)
Prop
4.
s1,s2:traversal(the_graph), i:Vertices(the_graph). P(i,s1,s2)
l_disjoint(Vertices(the_graph)+Vertices(the_graph);s2;s1)
5.
s1,s2:traversal(the_graph), i:Vertices(the_graph). P(i,s1,s2)
no_repeats(Vertices(the_graph)+Vertices(the_graph);s2)
6.
s:traversal(the_graph), i:Vertices(the_graph). member-paren(x,y.the_obj.eq(x,y);i;s)
P(i,s,nil)
7.
s1,s2,s3:traversal(the_graph), i,j:Vertices(the_graph). i-the_graph- > j
P(j,s1,s2)
P(i,s2 @ s1,s3)
P(i,s1,s3 @ s2)
8.
s1,s2:traversal(the_graph), i:Vertices(the_graph).
member-paren(x,y.the_obj.eq(x,y);i;s1)
P(i,[inr(i) / s1],s2)
P(i,s1,[inl(i) / (s2 @ [inr(i)])])
9.
M:
traversal(the_graph)
10.
i:Vertices(the_graph), s:traversal(the_graph). M([inl(i) / s])
M(s)
11.
i:Vertices(the_graph), s:traversal(the_graph).
member-paren(x,y.the_obj.eq(x,y);i;s)
M([inr(i) / s]) < M(s)
12.
x,y:Vertices(the_graph). the_obj.eq(x,y)
x = y
13.
T:Type, s:T, x:Vertices(the_graph), f:(T
Vertices(the_graph)
T).
L:Vertices(the_graph) List. (
y:Vertices(the_graph). x-the_graph- > y
(y
L)) & the_obj.eacc(f,s,x) = list_accum(s',x'.f(s',x');s;L)
14.
T:Type, s:T, f:(T
Vertices(the_graph)
T).
L:Vertices(the_graph) List. no_repeats(Vertices(the_graph);L) & (
y:Vertices(the_graph). (y
L)) & the_obj.vacc(f,s) = list_accum(s',x'.f(s',x');s;L)
15.
d:
16.
d1:
. d1 < d
(
s:traversal(the_graph), i:Vertices(the_graph). M(s)
d1
(
s':traversal(the_graph). M(s' @ s)
M(s) & P(i,s,s') & dfs(the_obj;s;i) = (s' @ s)))
17.
s:
traversal(the_graph)
18.
i:
Vertices(the_graph)
19.
M(s)
d
20.
member-paren(x,y.the_obj.eq(x,y);i;s)
21.
L:Vertices(the_graph) List. (
y:Vertices(the_graph). (y
L)
i-the_graph- > y)
(
s2:traversal(the_graph). M(s2) < d
member-paren(x,y.the_obj.eq(x,y);i;s2)
(
s':traversal(the_graph). M(s' @ s2)
M(s2) & P(i,s2,s') & list_accum(s',x'.dfs(the_obj;s';x');s2;L) = (s' @ s2)))
22.
L:
Vertices(the_graph) List
23.
y:Vertices(the_graph). i-the_graph- > y
(y
L)
24.
s':traversal(the_graph). M(s' @ [inr(i) / s])
M([inr(i) / s]) & P(i,[inr(i) / s],s') & list_accum(s',x'.dfs(the_obj;s';x');[inr(i) / s];L) = (s' @ [inr(i) / s])
s':traversal(the_graph). M(s' @ s)
M(s) & P(i,s,s') & [inl(i) / list_accum(s',x'.(
s',j. dfs(the_obj;s';j))(s',x');[inr(i) / s];L)] = (s' @ s)
traversal(the_graph)
By:
ReduceSOAps 0
THEN
ExRepD
THEN
InstConcl [[inl(i)] @ s' @ [inr(i)]]
THEN
Reduce 0
THEN
EasyHyp
THEN
Try ((RWO
Thm*
a,b,c:Top List. ((a @ b) @ c) ~ (a @ b @ c) 0) THEN (Reduce 0) THEN Analyze)
Generated subgoal:
1
24.
s':
traversal(the_graph)
25.
M(s' @ [inr(i) / s])
M([inr(i) / s])
26.
P(i,[inr(i) / s],s')
27.
list_accum(s',x'.dfs(the_obj;s';x');[inr(i) / s];L) = (s' @ [inr(i) / s])
M([inl(i) / ((s' @ [inr(i)]) @ s)])
M(s)
1
step
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(22steps total)
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Lemmas
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