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Talk:Vector-space

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m (oops -- content meant for VersionHistor)
 
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== Version 0 ==
 
 
=== Version 0.2 ===
 
 
==== Version 0.2.0 ====
 
 
* <hask>Data.Cross</hask>: generalized cross products
 
* <hask>distribD</hask> now takes only one function argument and ties its own knot.
 
* Renamed <hask>distribD</hask> to <hask>distrib</hask>.
 
* Now there are two power series modules: <hask>Maclaurin</hask> (was <hask>Derivative</hask>) and <hask>Horner</hask>. Now <hask>Derivative</hask> is an indirection to one or the other, for testing. See Doug McIlroy's paper "The Music of Streams".
 
* Factored <hask>Data.AdditiveGroup</hask> out of <hask>Data.VectorSpace</hask>
 
* <hask>LinearMap</hask> has a new data representation for linear maps, to replace the simple function representation. Used in <hask>Data.Maclaurin</hask>.
 
* <hask>Data.Derivative</hask> is now more than an indirection module. It re-wraps a power series type to provide different instances for <hask>VectorSpace</hask> and <hask>InnerSpace</hask>.
 
* Added support for OpenGL vector types. In ghc-6.8.2, I get an error if a <hask>LMapDom</hask> instance is compiled in any module except for <hask>Data.LinearMap</hask>. Until this code is removed, the <code>vector-space</code> package depends on <code>OpenGL</code>.
 
* Tests in <code>FieldTrip</code> show a dramatic slow-down, in contrast to my intended speed-up.
 
* Andy Gill found at least one cause for the slow-down, which has been fixed. I think we have a long way to go. There appear to be lots of redundant dictionary construction.
 
* <hask>Data.Horner</hask> removed temporarily, until re-sync'd with <hask>Data.Maclaurin</hask>.
 
 
==== Version 0.1.3 ====
 
 
* <hask>InnerSpace</hask> instance in <hask>Data.Derivative</hask>
 
 
==== Version 0.1.2 ====
 
 
* Renamed <hask>dId</hask> to <hask>idD</hask> and added <hask>fstD</hask> and <hask>sndD</hask>.
 
* Renamed <hask>bilinearD</hask> to <hask>distribD</hask>.
 
 
==== Version 0.1.1 ====
 
 
* Added some missing haddock docs
 
* Added a <hask>Complex</hask> instance of <hask>VectorSpace</hask>
 
 
==== Version 0.1 ====
 
 
* Changed representation of the derivative part of <hask>a :> b</hask>. Was <hask>a :> (a :-* b)</hask>. Now <hask>a :-* (a :> b)</hask>, which can also be written <hask>a :~> b</hask> (leaving the derivative's linearity implicit). The type <hask>a :~> b</hask> means infinitely differentiable functions from <hask>a</hask> to <hask>b</hask>.
 
 
=== Version 0.0.1 ===
 
 
* Changed repo location from darcs.haskell.org to http://code.haskell.org/vector-space.
 
 
* '''Oops''' - there's a serious mistake in the derivatives code in versions up through 0.0.1. I'm working on a solution. [Fixed in 0.1.]
 

Latest revision as of 19:05, 11 November 2008