Question

let G be a connected graph such that the graph formed by removing vertex x from...

let G be a connected graph such that the graph formed by removing vertex x from G is disconnected for all but exactly 2 vertices of G. Prove that G must be a path.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Prove or disapprove each of the following: (a) Every disconnected graph has an isolated vertex. (b)...
Prove or disapprove each of the following: (a) Every disconnected graph has an isolated vertex. (b) A graph is connected if and only if some vertex is connected to all other vertices. (c) If G is a simple, connected, Eulerian graph, with edges e, f that are incident to a common vertex, then G has an Eulerian circuit in which e and f appear consequently.
Let G be a simple graph with n(G) > 2. Prove that G is 2-connected iff...
Let G be a simple graph with n(G) > 2. Prove that G is 2-connected iff for every set of 3 distinct vertices, a, b and c, there is an a,c-path that contains b.
Let G be a graph or order n with independence number α(G) = 2. (a) Prove...
Let G be a graph or order n with independence number α(G) = 2. (a) Prove that if G is disconnected, then G contains K⌈ n/2 ⌉ as a subgraph. (b) Prove that if G is connected, then G contains a path (u, v, w) such that uw /∈ E(G) and every vertex in G − {u, v, w} is adjacent to either u or w (or both).
Supposed G is a graph, possibly not connected and u is a vertex of odd degree....
Supposed G is a graph, possibly not connected and u is a vertex of odd degree. Show that there is a path from u to another vertex v 6= u which also has odd degree.(hint: since u has odd degree it has paths to some other vertices. Just consider those.)
(a) Let L be a minimum edge-cut in a connected graph G with at least two...
(a) Let L be a minimum edge-cut in a connected graph G with at least two vertices. Prove that G − L has exactly two components. (b) Let G an eulerian graph. Prove that λ(G) is even.
Supposed G is a graph, possibly not connected and u is a vertex of odd degree....
Supposed G is a graph, possibly not connected and u is a vertex of odd degree. Show that there is a path from u to another vertex v does not equal u which also has odd degree.(hint: since u has odd degree it has paths to some other vertices. Just consider those.)
Graph Theory Let v be a vertex of a non trivial graph G. prove that if...
Graph Theory Let v be a vertex of a non trivial graph G. prove that if G is connected, then v has a neighbor in every component of G-v.
Let G = (X, E) be a connected graph. The distance between two vertices x and...
Let G = (X, E) be a connected graph. The distance between two vertices x and y of G is the shortest length of the paths linking x and y. This distance is denoted by d(x, y). We call the center of the graph any vertex x such that the quantity max y∈X d(x, y) is the smallest possible. Show that if G is a tree then G has either one center or two centers which are then neighbors
Let G be an n-vertex graph with n ≥ 2 and δ(G) ≥ (n-1)/2. Prove that...
Let G be an n-vertex graph with n ≥ 2 and δ(G) ≥ (n-1)/2. Prove that G is connected and that the diameter of G is at most two.
Let G=(V,E) be a connected graph with |V|≥2 Prove that ∀e∈E the graph G∖e=(V,E∖{e}) is disconnected,...
Let G=(V,E) be a connected graph with |V|≥2 Prove that ∀e∈E the graph G∖e=(V,E∖{e}) is disconnected, then G is a tree.