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problem 1:

a) Define Euler line and Euler graph with two exs?
b) A connected graph G is an Euler graph if and only if all vertices of G are of even degree.

problem 2: Define the terms multigraph and simple graph. Differentiate between them with the help of ex.

problem 3:

a) Prove that Petersen graph is neither Eulerian nor Semi Eulerian.
b) Prove that connected graph is Semi-Eulerian if and only if its has actually 0 or 2 vertices of add degree.

problem 4: Define the term simple graph. Prove that a simple graph with n position and k components can have at most (n-k)(n-k+1)/2 lines?

problem 5:

a) Define chromatic number of a graph and prove that every tree with 2 or more vertices is 2-chromatic?
b) Define covering  proving that covering of graph is minimal if graph comprises of no path of length 3 or more?

problem 6:

a) Prove: In any nondirected graph there is an even no of vertices of odd order.
b) Is there a simple graph with degree sequence (1,1,3,3,3,4,6,7)? Give reason?

problem 7:

a) Define simple graph, connected graph, degree of a vertex and minimal cut of a graph.
b) show that the maximum no of edges in a simple graph of n vertices is = n(n-1)/2

problem 8:

a) Describe the terms: Cycle, tree, forest and spanning tree.
b) State and describe Kruskals algorithm

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