| − | {{stub}}A '''field''' is a commutative [[Ring (mathematics)|ring]] which contains a non-zero multiplicative identity and all non-zero elements have multiplicative inverses. Everyday examples of fields include the [[real numbers]], [[complex numbers]] and the [[rationals]]. There is a unique finite field of characteristic <math>p</math> for each power of a prime number <math>p</math>. | + | {{stub}}A '''field''' is a commutative [[Ring (mathematics)|ring]] which contains a non-zero multiplicative identity and all non-zero elements have multiplicative inverses. Everyday examples of fields include the [[real numbers]], [[complex numbers]] and the [[rationals]]. There is a unique (up to [[isomorphism]]) finite field of [[characteristic]] <math>p</math> for each power of a prime number <math>p</math>. |