This thesis describes some of the basic results of combinatorial matrix theory. Combinatorial matrix theory is a branch of mathematics that connects combinatorics, graph theory and linear algebra. The first part of the thesis deals with algebraic properties of (0, 1)-matrices. We reformulate an elementary problem in geometry in terms of matrices and solve an interesting combinatorial problem with the help of the properties of (0, 1)-matrices. In the second part of the thesis we represent a graph with its adjacency matrix and its incidence matrix. We derive a relation between the two matrices and define a Laplacian matrix of a graph. We connect properties of a graph with algebraic properties of its adjacency and incidence matrix. At the and we discuss Laplacian matrix of a graph and derive a formula for calculating the number of spanning trees in a graph.
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