Is there any difference between lsa and lsi?
almost many materials say they both are same,but i came across one blog, which tells lsi is developed in 1998 and lsa came into existence in 2005.
is there any technical difference?
Hi D Paul Joseph,
This blog below tells the story of LSI and LSA: these two algorithms are based on SVD (singular value decomposition). According the article below, LSA may work differently to overcome the problem of synonymy and polysemy...
I've used LSA (with R), never LSI.
Blog :
http://stefansavev.com/blog/lsi-slash-lsa-slash-svd-a-bit-of-history/
Article on the technique of LSA :
https://onlinelibrary.wiley.com/doi/abs/10.1002/%28SICI%291097-4571%28199009%2941%3A6%3C391%3A%3AAID-ASI1%3E3.0.CO%3B2-9
LSA and LSI are mostly used synonymously, with the information retrieval community usually referring to it as LSI. LSA/LSI uses to decompose the term-document matrix A into a term-concept matrix U, a singular value matrix S, and a concept-document matrix V in the form: A = USV'.
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