Nuprl - Proof: dfs-df-traversal 2 2 2

(44steps total) PrintForm Definitions Lemmas graph 1 3 Sections Graphs Doc

1. the_graph: Graph
2. the_obj: GraphObject(the_graph)
3. s: traversal(the_graph)
4. i: Vertices(the_graph)
5. df-traversal(the_graph;s)
6. j:Vertices(the_graph). (inr(j) s) (inl(j) s) j-the_graph- > *i
7. s1: traversal(the_graph)
8. s2: traversal(the_graph)
9. i1: Vertices(the_graph)
10. (inr(i1) s1)
11. (inl(i1) s1)
12. paren(Vertices(the_graph);s2)
13. l_disjoint(Vertices(the_graph)+Vertices(the_graph);s2;s1)
14. no_repeats(Vertices(the_graph)+Vertices(the_graph);s2)
15. j:Vertices(the_graph). (inr(j) s2) i1-the_graph- > *j
16. j:Vertices(the_graph). i1-the_graph- > j j = i1 (inl(j) s2) (inl(j) s1) (inr(j) s1)
17. df-traversal(the_graph;s1)
18. j:Vertices(the_graph). (inr(j) s1) (inl(j) s1) j-the_graph- > *i1
19. df-traversal(the_graph;s2 @ [inr(i1) / s1])

df-traversal(the_graph;[inl(i1) / (s2 @ [inr(i1)] @ s1)])

By: Thin 6 THEN Thin 5 THEN Thin 4 THEN Thin 3

Generated subgoal:

1 3. s1: traversal(the_graph)
4. s2: traversal(the_graph)
5. i1: Vertices(the_graph)
6. (inr(i1) s1)
7. (inl(i1) s1)
8. paren(Vertices(the_graph);s2)
9. l_disjoint(Vertices(the_graph)+Vertices(the_graph);s2;s1)
10. no_repeats(Vertices(the_graph)+Vertices(the_graph);s2)
11. j:Vertices(the_graph). (inr(j) s2) i1-the_graph- > *j
12. j:Vertices(the_graph). i1-the_graph- > j j = i1 (inl(j) s2) (inl(j) s1) (inr(j) s1)
13. df-traversal(the_graph;s1)
14. j:Vertices(the_graph). (inr(j) s1) (inl(j) s1) j-the_graph- > *i1
15. df-traversal(the_graph;s2 @ [inr(i1) / s1])
df-traversal(the_graph;[inl(i1) / (s2 @ [inr(i1)] @ s1)]) 27 steps

About:

(44steps total) PrintForm Definitions Lemmas graph 1 3 Sections Graphs Doc