A matrix can also have entries that are themselves matrices. These four-by-four matrix matrix has four entries, so each one has 4 entries. This can be done by dividing each big matrix into four four by four matrixs.

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# Matrix Multiplication Inches Closer to Mythic Goal

A matrix can also have entries that are themselves matrices. These four-by-four matrix matrix has four entries, so each one has 4 entries. This can be done by dividing each big matrix into four four by four matrixs.

Read more at Quanta Magazine…