Further results on colored range searching

TM Chan, Q He, Y Nekrich - arxiv preprint arxiv:2003.11604, 2020 - arxiv.org
We present a number of new results about range searching for colored (or" categorical")
data: 1. For a set of $ n $ colored points in three dimensions, we describe randomized data …

Computational geometry: Generalized (or colored) intersection searching

P Gupta, R Janardan, S Rahul… - Handbook of Data …, 2018 - taylorfrancis.com
Problems arising in diverse areas, such as VLSI layout design, database query-retrieval,
robotics, and computer graphics can often be formulated as geometric intersection …

Orthogonal point location and rectangle stabbing queries in 3-d

TM Chan, Y Nekrich, S Rahul, K Tsakalidis - arxiv preprint arxiv …, 2018 - arxiv.org
In this work, we present a collection of new results on two fundamental problems in
geometric data structures: orthogonal point location and rectangle stabbing.-We give the first …

[PDF][PDF] Better data structures for colored orthogonal range reporting

TM Chan, Y Nekrich - Proc. ACM-SIAM Sympos. Discrete Algorithms …, 2020 - par.nsf.gov
Range searching on categorical, or “colored”, data has been studied extensively for over two
decades. In this paper, we obtain the current best results for perhaps the most basic, and …

A linear-space data structure for Range-LCP queries in poly-logarithmic time

P Abedin, A Ganguly, WK Hon, K Matsuda… - Theoretical Computer …, 2020 - Elsevier
Abstract Let T [1, n] be a text of length n and T [i, n] be the suffix starting at position i. Also, for
any two strings X and Y, let LCP (X, Y) denote their longest common prefix. The range-LCP …

Efficient top-k indexing via general reductions

S Rahul, Y Tao - Proceedings of the 35th ACM SIGMOD-SIGACT-SIGAI …, 2016 - dl.acm.org
Let D be a set of n elements each associated with a real-valued weight, and Q be the set of
all possible predicates allowed on those elements. Given a predicate in Q and integer k, a …

Approximate range counting revisited

S Rahul - arxiv preprint arxiv:1512.01713, 2015 - arxiv.org
We study range-searching for colored objects, where one has to count (approximately) the
number of colors present in a query range. The problems studied mostly involve orthogonal …

Categorical range reporting with frequencies

A Ganguly, JI Munro, Y Nekrich, R Shah… - … on Database Theory …, 2019 - drops.dagstuhl.de
In this paper, we consider a variant of the color range reporting problem called color
reporting with frequencies. Our goal is to pre-process a set of colored points into a data …

Range Longest Increasing Subsequence and its Relatives: Beating Quadratic Barrier and Approaching Optimality

S Rahul - arxiv preprint arxiv:2404.04795, 2024 - arxiv.org
In this work, we present a plethora of results for the range longest increasing subsequence
problem (Range-LIS) and its variants. The input to Range-LIS is a sequence $\mathcal {S} …

A guide to designing top-k indexes

S Rahul, Y Tao - ACM SIGMOD Record, 2019 - dl.acm.org
Top-k search, which reports the k elements of the highest importance from all the elements
in an underlying dataset that satisfy a certain predicate, has attracted significant attention …