Firstly, the math behind quantum physics makes extensive use of matrices—rectangular arrays of numbers.

Continuous symmetry groups are mathematically represented by matrices -- rectangular arrays of numbers -- which can convert the properties of the mathematical object into linear algebra.

A history of prime numbers Informally, a positive counting number larger than one is prime if that number of dots can be arranged only into a rectangular array with one column or one row. For ...

Prime numbers have captivated mathematicians for thousands of years—and now cloud computing is helping them chase the biggest ones yet.