Type Checking Type Classes

1992-11-05 Thread Tobias . Nipkow
The following paper, to be presented at POPL93, is now available by ftp: Tobias Nipkow and Christian Prehofer Type Checking Type Classes We study the type inference problem for a system with type classes

Cyclic Types

1993-02-26 Thread Tobias . Nipkow
Lennart Augustsson writes: I thought there were problems with extending Hindley-Milner type systems with cyclic types: The type inference can handle type correct programs, but will loop for certain type incorrect programs, or am I mistaken? It is absolutely unproblematic to extend

[Haskell-cafe] Gaussian elimination

2011-08-18 Thread Tobias Nipkow
Hi, I came up with the following extremely compact version of Gaussian elimination for matrices represented as functions. I searched the web but found nothing resembling it, probably because of its inefficiency. Has anybody seen something like it before? Thanks Tobias gauss :: Int - (Int - Int -