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1
FM-Index Reveals the Reverse Suffix Array
Gibney, Daniel
;
Thankachan, Sharma V.
;
Hooshmand, Sahar
. - : LIPIcs - Leibniz International Proceedings in Informatics. 31st Annual Symposium on Combinatorial Pattern Matching (CPM 2020), 2020
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2
FM-Index Reveals the Reverse Suffix Array ...
Ganguly, Arnab
;
Gibney, Daniel
;
Hooshmand, Sahar
. - : Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020
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3
On the Complexity of BWT-Runs Minimization via Alphabet Reordering ...
Bentley, Jason W.
;
Gibney, Daniel
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020
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4
Study of central exclusive [Image: see text] production in proton-proton collisions at [Formula: see text] and 13TeV
Sirunyan, A. M.
;
Tumasyan, A.
;
Adam, W.
...
In: Eur Phys J C Part Fields (2020)
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5
On the Hardness and Inapproximability of Recognizing Wheeler Graphs
Gibney, Daniel
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2019. : LIPIcs - Leibniz International Proceedings in Informatics. 27th Annual European Symposium on Algorithms (ESA 2019), 2019
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6
On the Hardness and Inapproximability of Recognizing Wheeler Graphs ...
Gibney, Daniel
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH, Wadern/Saarbruecken, Germany, 2019
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7
On the Complexity of BWT-runs Minimization via Alphabet Reordering ...
Bentley, Jason
;
Gibney, Daniel
;
Thankachan, Sharma V.
. - : arXiv, 2019
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8
On the Hardness and Inapproximability of Recognizing Wheeler Graphs ...
Gibney, Daniel
;
Thankachan, Sharma V.
. - : arXiv, 2019
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9
Non-Overlapping Indexing - Cache Obliviously
Hooshmand, Sahar
;
Abedin, Paniz
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2018. : LIPIcs - Leibniz International Proceedings in Informatics. Annual Symposium on Combinatorial Pattern Matching (CPM 2018), 2018
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10
Structural Pattern Matching - Succinctly
Ganguly, Arnab
;
Shah, Rahul
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2017. : LIPIcs - Leibniz International Proceedings in Informatics. 28th International Symposium on Algorithms and Computation (ISAAC 2017), 2017
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11
Structural Pattern Matching - Succinctly ...
Ganguly, Arnab
;
Shah, Rahul
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH, Wadern/Saarbruecken, Germany, 2017
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12
Search for dark matter produced in association with heavy-flavor quark pairs in proton-proton collisions at [Formula: see text]
Sirunyan, A. M.
;
Tumasyan, A.
;
Adam, W.
. - : Springer Berlin Heidelberg, 2017
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13
Space-Time Trade-Offs for the Shortest Unique Substring Problem
Ganguly, Arnab
;
Hon, Wing-Kai
;
Shah, Rahul
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2016. : LIPIcs - Leibniz International Proceedings in Informatics. 27th International Symposium on Algorithms and Computation (ISAAC 2016), 2016
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14
Parameterized Pattern Matching -- Succinctly ...
Ganguly, Arnab
;
Shah, Rahul
;
Thankachan, Sharma V.
. - : arXiv, 2016
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15
Forbidden Extension Queries
Biswas, Sudip
;
Ganguly, Arnab
;
Shah, Rahul
;
Thankachan, Sharma V.
. - : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2015. : LIPIcs - Leibniz International Proceedings in Informatics. 35th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2015), 2015
Abstract:
Document retrieval is one of the most fundamental problem in information retrieval. The objective is to retrieve all documents from a document collection that are relevant to an input pattern. Several variations of this problem such as ranked document retrieval, document listing with two patterns and forbidden patterns have been studied. We introduce the problem of document retrieval with forbidden extensions. Let D={T_1,T_2,.,T_D} be a collection of D string documents of n characters in total, and P^+ and P^- be two query patterns, where P^+ is a proper prefix of P^-. We call P^- as the forbidden extension of the included pattern P^+. A forbidden extension query < P^+,P^- > asks to report all occ documents in D that contains P^+ as a substring, but does not contain P^- as one. A top-k forbidden extension query < P^+,P^-,k > asks to report those k documents among the occ documents that are most relevant to P^+. We present a linear index (in words) with an O(|P^-| + occ) query time for the document listing problem. For the top-k version of the problem, we achieve the following results, when the relevance of a document is based on PageRank: - an O(n) space (in words) index with O(|P^-|log sigma+ k) query time, where sigma is the size of the alphabet from which characters in D are chosen. For constant alphabets, this yields an optimal query time of O(|P^-|+ k). - for any constant epsilon > 0, a |CSA| + |CSA^*| + Dlog frac{n}{D} + O(n) bits index with O(search(P)+ k cdot tsa cdot log ^{2+epsilon} n) query time, where search(P) is the time to find the suffix range of a pattern P, tsa is the time to find suffix (or inverse suffix) array value, and |CSA^*| denotes the maximum of the space needed to store the compressed suffix array CSA of the concatenated text of all documents, or the total space needed to store the individual CSA of each document.
Keyword:
Data processing Computer science
;
document retrieval
;
range queries
;
succinct data structure
;
suffix trees
URN:
urn:nbn:de:0030-drops-56522
URL:
https://doi.org/10.4230/LIPIcs.FSTTCS.2015.320
https://drops.dagstuhl.de/opus/volltexte/2015/5652/
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16
Preventive Audiology: Screening for Hearing Impairment in Children Having Recurrent URTI
Sharma, K.
;
Pannu, M. S.
;
Arora, A.
. - : Springer India, 2015
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17
Ranked document selection
J. Ian Munro
;
Gonzalo Navarro
;
Rahul Shah
...
In: http://www.dcc.uchile.cl/~gnavarro/ps/swat14.pdf (2014)
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18
New Space/Time Tradeoffs for Top-k Document Retrieval on Sequences
Gonzalo Navarro
;
Sharma V. Thankachan
In: http://www.dcc.uchile.cl/~gnavarro/ps/tcs14.pdf (2014)
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19
On Entropy-Compressed Text Indexing in External Memory
Wing-kai Hon
;
Rahul Shah
;
Sharma V. Thankachan
...
In: http://faculty.cse.tamu.edu/jsv/Papers/HST09externaltextindexing.pdf (2009)
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20
A measurement of the charged and neutral B meson lifetimes using fully reconstructed decays
Aubert, B.
;
Boucham, A.
;
Boutigny, D.
...
In: International Conference on High-Energy Physics 30 ICHEP 2000 ; http://hal.in2p3.fr/in2p3-00006091 ; International Conference on High-Energy Physics 30 ICHEP 2000, Jul 2000, Osaka, Japan. pp.1-22 (2000)
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