The incident matrix of a graph is given below:
The corresponding graph is
Consider the following statements
1. The rows of the incidence matrix [A] represent the number of branches and the column of the matrix represents the number of nodes in the given graph.
2. The algebraic sum of elements of all the columns is zero.
3. The rank of the incidence matrix is (n–1) where n is the number of nodes.
4. The determinant of the incidence matrix of a closed loop is equal to unity.
Which of the above statements are correct?
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