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## [Axiom-developer] [DirectProduct] (new)

 From: Bill Page Subject: [Axiom-developer] [DirectProduct] (new) Date: Sat, 02 Jul 2005 10:45:48 -0500

```Changes http://page.axiom-developer.org/zope/mathaction/DirectProduct/diff
--
Description:

This type represents the finite direct or cartesian product of an
underlying component type. This contrasts with simple vectors in that
the members can be viewed as having constant length. Thus many
categorical properties can by lifted from the underlying component type.
Component extraction operations are provided but no updating operations.
Thus new direct product elements can either be created by converting
vector elements using the \spadfun{directProduct} function
or by taking appropriate linear combinations of basis vectors provided