Keyphrases
- information retrieval
- query expansion
- theoretical framework
- information retrieval systems
- retrieval systems
- theoretical basis
- computer algebra
- relevance feedback
- computational model
- information theory
- set theoretic
- efficient retrieval
- image database
- image retrieval
- artificial intelligence
- average precision
- databases
- retrieval accuracy
- shape retrieval
- linear algebra
- formal theory
- algebraic geometry