Hi all, I am happy to announce hmatrix-0.11, a package for numerical computation based on LAPACK and GSL. Home page: http://code.haskell.org/hmatrix/ Hackage: http://hackage.haskell.org/package/hmatrix Recent changes: http://code.haskell.org/hmatrix/CHANGES By default this version uses Data.Vector.Storable from Roman Leshchinskiy’s vector package. This is useful for working with 1D arrays without explicit conversion (but note that Matrix t /= Vector (Vector t)). As a result, there is a different Show/Read instance for Vector, but no other changes should be observed using only hmatrix functions. (A possible issue is that empty vectors are typically not allowed in hmatrix, but can now be easily created using tools in the vector package.) I hope this is useful. In any case, this can be disabled with flag -f-vector and we can still have O(1) conversion functions. Thanks to everyone who contributed with patches, bug reports, suggestions, and installation problems. Special thanks go to Vivian McPhail for many excellent contributions, including single precision support, API reorganization, and many useful functions. Alberto PS: In relation with the license thread, I am open to change to BSD3 the source code not depending on GSL.