Domain basis: Difference between revisions

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Interval bases for temperaments: correction re: relationship between subspace and space
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= Interval bases for temperaments =
= Interval bases for temperaments =


In the context of a [[regular temperament]], an interval basis serves as a minimal representation of all the intervals this temperament can temper (some of which it completely [[tempers out]]). The full set of these possible-to-temper intervals is called the '''interval subspace'''; it is a ''sub''space, not a space, because the ''full'' interval space would include all conceivable intervals, even those outside the temperament.
In the context of a [[regular temperament]], an interval basis serves as a minimal representation of all the intervals this temperament can temper (some of which it completely [[tempers out]]). The full set of these possible-to-temper intervals is called the '''interval subspace'''; it is a ''sub''space with respect to the ''full'' interval space which includes all conceivable intervals, even those outside the temperament.


So, for instance, a temperament in the 2.3.5 interval subspace cannot temper the intervals 7/6 or 11/8, because there is no way to represent either of those intervals using only the primes 2, 3, and 5. It could, however, temper 6/5, 5/4, 10/9, or 9/8, etc., because those intervals ''can'' be represented using only those three primes.
So, for instance, a temperament in the 2.3.5 interval subspace cannot temper the intervals 7/6 or 11/8, because there is no way to represent either of those intervals using only the primes 2, 3, and 5. It could, however, temper 6/5, 5/4, 10/9, or 9/8, etc., because those intervals ''can'' be represented using only those three primes.