power basis over
Let be a number field with and denote the ring of integers of . Then has a power basis over (sometimes shortened simply to power basis) if there exists such that the set is an integral basis for . An equivalent (http://planetmath.org/Equivalent3) condition is that . Note that if such an exists, then and .
Not all rings of integers have power bases. (See the entry biquadratic field for more details.) On the other hand, any ring of integers of a quadratic field has a power basis over , as does any ring of integers of a cyclotomic field. (See the entry examples of ring of integers of a number field for more details.)
Title | power basis over |
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Canonical name | PowerBasisOvermathbbZ |
Date of creation | 2013-03-22 15:56:55 |
Last modified on | 2013-03-22 15:56:55 |
Owner | Wkbj79 (1863) |
Last modified by | Wkbj79 (1863) |
Numerical id | 17 |
Author | Wkbj79 (1863) |
Entry type | Definition |
Classification | msc 11R04 |
Synonym | power basis |
Synonym | power bases |
Related topic | ConditionForPowerBasis |