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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

group, grouping go
any number of entities (members) considered as a unit

arrangement go
an orderly grouping (of things or persons) considered as a unit

array go
an orderly arrangement

matrix go
(mathematics) a rectangular array of quantities or expressions set out by rows and columns

square matrix
a matrix with the same number of rows and columns

noun.group

6 Subcategories

diagonal matrix go
a square matrix with all elements not on the main diagonal equal to zero
determinant go
a square matrix used to solve simultaneous equations
Latin square go
a square matrix of n rows and columns
magic square go
a square matrix of n rows and columns
nonsingular matrix go
a square matrix whose determinant is not zero
singular matrix go
a square matrix whose determinant is zero