Original question and givens
Use the complete finite undirected loop-free simple graph on Fin(7)={0,…,6} with edge set=[[0, 2], [0, 4], [0, 5], [1, 3], [1, 4], [2, 3], [2, 4], [2, 5], [3, 4]]. Loops and duplicate undirected edges are forbidden. Connectivity is complete path reachability, not just one traversal fragment. Length-zero paths make every vertex reachable from itself, including isolated vertices. Do not switch to directed weak/strong, infinite or dynamic connectivity. left=5, right=2. Give (left,right,left_component,same_component?).
G001 — Use the complete finite undirected loop-free simple graph on Fin(7)={0,…,6} with edge set=[[0, 2], [0, 4], [0, 5], [1, 3], [1, 4], [2, 3], [2, 4], [2, 5], [3, 4]]. Loops and duplicate undirected edges are forbidden. Connectivity is complete path reachability, not just one traversal fragment. Length-zero paths make every vertex reachable from itself, including isolated vertices. Do not switch to directed weak/strong, infinite or dynamic connectivity. left=5, right=2. Give (left,right,left_component,same_component?).
Step-by-step derivation
S001 · implies
Before
full carrier Fin(7);raw undirected edges=[[0, 2], [0, 4], [0, 5], [1, 3], [1, 4], [2, 3], [2, 4], [2, 5], [3, 4]]
After
canonical simple edges=[[0, 2], [0, 4], [0, 5], [1, 3], [1, 4], [2, 3], [2, 4], [2, 5], [3, 4]];full adjacency rows=[[2, 4, 5], [3, 4], [0, 3, 4, 5], [1, 2, 4], [0, 1, 2, 3], [0, 2], []]
Conditions: none
Build adjacency on the full carrier,rejecting loops and duplicate undirected edges.Vertices absent from edges retain empty rows;do not switch to directed connectivity.
Step identifiers and dependencies
Rule: component_full_undirected_graph_includes_isolates · Uses: G001
S002 · implies
Before
left vertex:start vertex=5;complete adjacency=[[2, 4, 5], [3, 4], [0, 3, 4, 5], [1, 2, 4], [0, 1, 2, 3], [0, 2], []]
After
initial visited=[5];path to start=[5];edge length0
Conditions: none
The start reaches itself by a length-zero path.Even an isolated vertex must be included rather than omitted for having no edges.
Step identifiers and dependencies
Rule: component_zero_length_reflexive_path · Uses: G001, S001
S003 · implies
Before
left vertex:layer=0;frontier=[5];all frontier neighbors=[0, 2]
After
previously seen=[5];new vertices=[0, 2]
Conditions: none
At each layer inspect every neighbor of every frontier vertex,then add only unvisited distinct labels.Do not stop at a plausible-looking fragment.
Step identifiers and dependencies
Rule: component_complete_frontier_expansion · Uses: G001, S002
S004 · implies
Before
left vertex:new vertex=0;earliest frontier parent=5;parent path=[5]
After
append actual parent edge;reachable path=[5, 0]
Conditions: none
Extend the established parent path by an original graph edge,so every added vertex really is reachable.
Step identifiers and dependencies
Rule: component_each_new_vertex_path_witness · Uses: G001, S003
S005 · implies
Before
left vertex:new vertex=2;earliest frontier parent=5;parent path=[5]
After
append actual parent edge;reachable path=[5, 2]
Conditions: none
Extend the established parent path by an original graph edge,so every added vertex really is reachable.
Step identifiers and dependencies
Rule: component_each_new_vertex_path_witness · Uses: G001, S004
S006 · implies
Before
left vertex:layer=1;frontier=[0, 2];all frontier neighbors=[0, 2, 3, 4, 5]
After
previously seen=[0, 2, 5];new vertices=[3, 4]
Conditions: none
At each layer inspect every neighbor of every frontier vertex,then add only unvisited distinct labels.Do not stop at a plausible-looking fragment.
Step identifiers and dependencies
Rule: component_complete_frontier_expansion · Uses: G001, S005
S007 · implies
Before
left vertex:new vertex=3;earliest frontier parent=2;parent path=[5, 2]
After
append actual parent edge;reachable path=[5, 2, 3]
Conditions: none
Extend the established parent path by an original graph edge,so every added vertex really is reachable.
Step identifiers and dependencies
Rule: component_each_new_vertex_path_witness · Uses: G001, S006
S008 · implies
Before
left vertex:new vertex=4;earliest frontier parent=0;parent path=[5, 0]
After
append actual parent edge;reachable path=[5, 0, 4]
Conditions: none
Extend the established parent path by an original graph edge,so every added vertex really is reachable.
Step identifiers and dependencies
Rule: component_each_new_vertex_path_witness · Uses: G001, S007
S009 · implies
Before
left vertex:layer=2;frontier=[3, 4];all frontier neighbors=[0, 1, 2, 3, 4]
After
previously seen=[0, 2, 3, 4, 5];new vertices=[1]
Conditions: none
At each layer inspect every neighbor of every frontier vertex,then add only unvisited distinct labels.Do not stop at a plausible-looking fragment.
Step identifiers and dependencies
Rule: component_complete_frontier_expansion · Uses: G001, S008
S010 · implies
Before
left vertex:new vertex=1;earliest frontier parent=3;parent path=[5, 2, 3]
After
append actual parent edge;reachable path=[5, 2, 3, 1]
Conditions: none
Extend the established parent path by an original graph edge,so every added vertex really is reachable.
Step identifiers and dependencies
Rule: component_each_new_vertex_path_witness · Uses: G001, S009
S011 · implies
Before
left vertex:layer=3;frontier=[1];all frontier neighbors=[3, 4]
After
previously seen=[0, 1, 2, 3, 4, 5];new vertices=[]
Conditions: none
At each layer inspect every neighbor of every frontier vertex,then add only unvisited distinct labels.Do not stop at a plausible-looking fragment.
Step identifiers and dependencies
Rule: component_complete_frontier_expansion · Uses: G001, S010
S012 · implies
Before
left vertex:final visited=[0, 1, 2, 3, 4, 5];all [vertex,neighbors,outside neighbors] rows=[[0, [2, 4, 5], []], [1, [3, 4], []], [2, [0, 3, 4, 5], []], [3, [1, 2, 4], []], [4, [0, 1, 2, 3], []], [5, [0, 2], []]]
After
no edge leaves visited;every visited vertex has a path;visited equals full reachable set
Conditions: none
Path witnesses give visited⊆reachable.At completion no edge leaves visited.If a path reached outside,it would have a first leaving edge,a contradiction,so reachable⊆visited.Both directions establish the whole component,not a traversal order.
Step identifiers and dependencies
Rule: component_reachable_and_closed_set_completeness · Uses: G001, S011
S013 · implies
Before
left=5;right=2;whole left component=[0, 1, 2, 3, 4, 5]
After
same component=Yes
Conditions: none
Compute the whole left component before testing the right label.Equal endpoints are connected by a zero-length path even if isolated.
Step identifiers and dependencies
Rule: component_membership_after_complete_reachability · Uses: G001, S012