[Afaik] Lucene stemming is based on Snowball (http://snowball.tartarus.org/) and snowball is an implementation of Porter's algorithm ( http://www.tartarus.org/~martin/PorterStemmer/) so, if I'm not wrong, you should refer to them.
- Re: What is stemming? Giovanni Novelli
- RE: What is stemming? Koji Sekiguchi
- RE: What is stemming? anton