## Quick Reference

The *n*×*n* identity matrix **I**, or **I**_{n}, is the *n*×*n* matrixwith each diagonal entry equal to 1 and all other entries equal to 0. It is the identity element for the set of *n*×*n* matrices with multiplication.

*Subjects:*
Mathematics.

## Related content in Oxford Index

##### Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.