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The package nicematrix is a LaTeX package which provides tools to create tabulars, arrays and matrices (ctan.org/pkg/nicematrix).

This package provides environments {NiceTabular}, {NiceArray}, {NiceMatrix}, {pNiceMatrix}, etc. similar to the well-known environments of the packages array and amsmath but with more functionalities. This package uses PGF to create PGF/Tikz nodes under the cells of the arrays and uses these nodes for the new functionalities (see the package on CTAN).