# AI

### From HaskellWiki

## Contents |

## 1 Introduction

This is the home for the Haskell AI Strike Force! Here we will collect code, problems, papers, ideas, and people for putting together a flexible AI toolkit in Haskell.

## 2 People

If interested in contributing to or monitoring this project, please put your name, nickname (if applicable - e.g., if you talk on #haskell), and email address so we can keep each other up-to-date.

Yuriy Pitomets (netsu) <pitometsu at gmail>

Mark Wong-VanHaren (marklar) <markwvh at gmail>

Andrew Wagner (chessguy) <wagner dot andrew at gmail>

Bryan Green (shevek) <dbryan dot green at gmail>

Ricardo Herrmann <rherrmann at gmail>

Dan Doel (dolio) <dan dot doel at gmail>

Chung-chieh Shan (ccshan) <ccshan at cs dot rutgers dot edu>

Adam Wyner (Lawman) <adam dot wyner dot info>

Dave Tapley (DukeDave) <dukedave at gmail>

Lloyd Allison <lloyd dot allison at infotech dot monash dot edu dot au>

Jim Geovedi <jim at geovedi dot com>

Paul Berg (Procyon) <procyon at procyondevelopments dot com>

Eric Kow (kowey) <eric dot kow at gmail> [watching on the sidelines]

Charles Blundell <blundellc at gmail>

Mathew Mills (mathewm) <mathewmills (at) gmail (dot) com>

Jason Morton (inverselimit) <jason.morton at gmail>

Jiri Hysek (dvekravy) <xhysek02 at stud dot fit dot vutbr dot cz> [NN, EA]

Shahbaz Chaudhary <shahbazc at gmail> [interested in GP]

Hans van Thiel <hthiel dot char á zonnet tot nl> [automated rule discovery, author of the Emping data mining utility]

Alp Mestanogullari (Alpounet) <alp (at) mestan (dot) fr> [machine learning mainly]

Chris Pettitt (cpettitt) <cpettitt at gmail>

Nathaniel Neitzke (nneitzke) <nightski at gmail>

Ricardo Honorato-Zimmer (_rata_) <rikardo dot horo at gmail dot com>

Raphael Javaux (RaphaelJ) <raphaeljavaux at gmail dot com>

Mahmut Bulut (vertexclique) <mahmutbulut0 at gmail dot com> (ML, natural language processing, swarming intelligence)

Mike Izbicki <mike at izbicki.me>

Chris Taylor (crntaylor) <crntaylor at gmail>

Libor Wagner <wagnelib at cmp dot felk dot cvut dot cz>

Florian Grunert <fgrunert ätt uni-osnabrueck dot de>

Chad Scherrer <chad (dot) scherrer (at) gmail> (Parallel learning algrorithms, L1 regularization, Bayesian inference)

## 3 Ideas

- In short, parts of this project can range from established ideas to new syntheses. ccshan: The high level of domain-specific abstraction that Haskell enables is ideal for AI, because AI programs are often "meta": we need to model agents who model the world, and sometimes to model agents who model agents who model the world, etc. In particular, monads are a good way to structure and solve decision processes, as I've started to explore as part of a course on computational modeling that I'm teaching. Given that Haskell is a good language for modular interpreters and compilers, it would also be nice to create and refactor in Haskell an implementation of a rational programming language like Avi Pfeffer's IBAL -- not only is probability distribution a monad, I just realized that a certain kind of variable elimination is simply garbage collection in a call-by-need language!

## 4 Things that need a home

If there are things that should be included in the project, but you're not sure where it should go, place it here! I'll start with:

- http://catenova.org/~awagner/Simplifier (broken link)
- This was given to me by Alfonso Acosta (mentioned recently on haskell-cafe)

- http://catenova.org/~awagner/GPLib (broken link)
- GPLib is a work in progress by yours truly, hopefully a future framework for genetic algorithms in haskell.

I've proposed a machine learning library for this year's Google Summer of Code. [1] There has been a few interested (and seemingly well qualified) students, too. I'm not sure if it qualifes as "AI", but if you are interested in this project (as a potential student, mentor, or just...well, interested), please add yourself to the above link, and/or get in touch with me at <ketil at malde dot org>. --Ketil 07:46, 26 March 2007 (UTC)

Martin Erwig's probabilistic functional programming (PFP) project, including an implementation of the probability monad:

Culmination of some recent posts about the probability monad on Random Hacks (including a darcs repository):

sigfpe's coverage and highly algebraic view of the probability monad in Haskell:

Two links I found today that are interesting:

Polytypic unification - unification seems particularly useful for AI tasks (at least natural language stuff)... wouldn't be nice to have a generic library that does it for you?

Easy-to-use work-in-progress neural network library, by Alp Mestan and Chaddaï Fouché :

Implementation of some of the algorithms in Russell and Norvig's "Artificial Intelligence: A Modern Approach", by Chris Taylor:

## 5 Proposed Module Hierarchy

- AI
- AI.Searching
- AI.Searching.Evolutionary

- AI.Logic
- AI.Planning
- AI.Planning.Swarm

- AI.Probabilistic
- AI.Learning
- AI.Learning.Kernel
- AI.Learning.NeuralNet

- AI.Classification
- AI.Classification.ExpertSystem

- AI.Communication

- AI.Searching

## 6 Proposed sample format for a wiki page on a topic or sub-topic

**AI/Logic/Fuzzy**

The slashes show that Logic is a subpage of **AI** and Fuzzy is a subpage of AI/Logic. MediaWiki will then generate links back up the chain of pages. (Try the links to see)

- Fuzzy logic is blah blah...
- Sub-topics:
- Trivial fuzzy logic in Haskell
- Type 2 fuzzy logic

- Links to existing literature:
- General
- My first fuzzy logic book

- Specific to functional programming / Haskell
- Fun with fuzzy functions

- General
- Typical problems:
- Problem 1: blah blah blah
- Problem 2: blah blah blah

- List of people involved in the area
- Me
- Someone else

- Body
- List of goals
- Progress being made on them
- Code and documentation.

## 7 Current sub-pages

## 8 External links

- Packages at Hackage, marked AI
- HaskLab Wiki
- The HaskLab mailing-list
- The HaskLab Archives (mailing-list archive)
- Preventing memoization in (AI) search problems
- Digit recognition with a neural network. First attempt! (Blog article)
- Haskell Neural Network: plugging a space leak (Blog article)
- Further Reading
- hs-logic; logic programming in Haskell (software on github)