Common
Incidence matrix
Matrix that shows the relationship between two classes of objects
Incidence matrix
In mathematics, an incidence matrix is a logical matrix that shows the relationship between two classes of objects, usually called an incidence relation. If the first class is X and the second is Y, the matrix has one row for each element of X and one column for each mapping from X to Y. The entry in row x and column y is 1 if the vertex x is part of (called incident in this context) the mapping that corresponds to y, and 0 if it is not. There are variations; see below.
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