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Onofre Martorell Nadal

dblp:369/7117 · DBLP profile ↗
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1ranked-venue papers
0as first author
1since 2021 · last 2023
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Theoretical computer science
1 paper
Mathematical optimization · 67% Combinatorics and discrete mathematics · 33%
Artificial intelligence
1 paper
3D vision · 100%

Topics — the 4 heaviest of 5, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Computer vision › 3D vision
shape matching
0.712023
Kissing to Find a Match: Efficient Low-Rank Permutation Representation · NeurIPS 2023
Mathematical optimization › combinatorial optimization
assignment problem
0.712023
Kissing to Find a Match: Efficient Low-Rank Permutation Representation · NeurIPS 2023
Combinatorics and discrete mathematics › combinatorial matrix theory
permutation matrix
0.712023
Kissing to Find a Match: Efficient Low-Rank Permutation Representation · NeurIPS 2023
Mathematical optimization › combinatorial optimization › assignment problem
quadratic assignment problem
0.712023
Kissing to Find a Match: Efficient Low-Rank Permutation Representation · NeurIPS 2023

Methods — techniques the papers use, named apart from their topics

low-rank matrix factorization · 1.3kissing number theory · 1.3
YearPublicationVenuePosition
2023 Kissing to Find a Match: Efficient Low-Rank Permutation Representation
abstract
Permutation matrices play a key role in matching and assignment problems across the fields, especially in computer vision and robotics. However, memory for explicitly representing permutation matrices grows quadratically with the size of the problem, prohibiting large problem instances. In this work, we propose to tackle the curse of dimensionality of large permutation matrices by approximating them using low-rank matrix factorization, followed by a nonlinearity. To this end, we rely on the Kissing number theory to infer the minimal rank required for representing a permutation matrix of a given size, which is significantly smaller than the problem size. This leads to a drastic reduction in computation and memory costs, e.g., up to $3$ orders of magnitude less memory for a problem of size $n=20000$, represented using $8.4\times10^5$ elements in two small matrices instead of using a single huge matrix with $4\times 10^8$ elements. The proposed representation allows for accurate representations of large permutation matrices, which in turn enables handling large problems that would have been infeasible otherwise. We demonstrate the applicability and merits of the proposed approach through a series of experiments on a range of problems that involve predicting permutation matrices, from linear and quadratic assignment to shape matching problems.
Hannah Dröge, Zorah Lähner, Yuval Bahat, Onofre Martorell Nadal, Felix Heide, Michael Möller 0001
NeurIPS4