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# What is a singular matrix?

**A singular matrix, also called degenerate matrix, is a square matrix whose determinant is zero and that doesn't have a matrix inverse.** It's rare to come across a singular matrix because a square matrix selected from a continuous uniform distribution on its entries will almost never be singular.

The opposite of a singular matrix is a non-singular matrix or non-degenerate matrix, which is also a square matrix but whose determinant is not equal to zero. Matrix inversion is the process of calculating the matrix Y that satisfies the prior equation for a given invertible matrix X. A matrix is invertible if it has an inverse, is non-singular or is non-degenerate.

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## What is an orthogonal matrix?

A: An orthogonal matrix is a square matrix that has a transpose identical to its inverse. The transpose of a matrix is found by swapping each element a(ij) of... Full Answer >Filed Under: -
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## What do you call two numbers whose product is one?

A: A number when multiplied by its multiplicative inverse, or its reciprocal, yields a product of one, which is known as the multiplicative identity of a numb... Full Answer >Filed Under: -
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## Is there a formula for inverse variation?

A: The formula for inverse variation is k equals x times y, where k is a constant quantity, x is one variable and y is another variable. Inverse variation is ... Full Answer >Filed Under: -
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## What is a multiplicative inverse?

A: The multiplicative inverse of a number is the number by which it can be multiplied to yield 1. It is also known as the reciprocal of a number. Full Answer >Filed Under: