Combining TF-IDF Text Retrieval with an Inverted Index over Symbol Pairs in Math Expressions: The Tangent Math Search Engine at NTCIR 2014.

@inproceedings{pattaniyil-2014-combining, author = {Nidhin Pattaniyil and Richard Zanibbi}, editor = {Noriko Kando and Hideo Joho and Kazuaki Kishida}, title = {{Combining TF-IDF Text Retrieval with an Inverted Index over Symbol Pairs in Math Expressions: The Tangent Math Search Engine at NTCIR 2014}}, booktitle = {{Proceedings of the 11th NTCIR Conference on Evaluation of Information Access Technologies, NTCIR-11, National Center of Sciences, Tokyo, Japan, December 9-12, 2014}}, publisher = {National Institute of Informatics (NII)}, year = {2014}, url = {http://research.nii.ac.jp/ntcir/workshop/OnlineProceedings11/pdf/NTCIR/Math-2/08-NTCIR11-MATH-PattaniyilN.pdf} }