Search Results for author: Lluís Alemany-Puig

Found 8 papers, 2 papers with code

The expected sum of edge lengths in planar linearizations of trees. Theory and applications

no code implementations12 Jul 2022 Lluís Alemany-Puig, Ramon Ferrer-i-Cancho

In the domain of applications, we derive a $O(n)$-time algorithm to calculate the expected value of the sum of edge lengths.

Sentence

The Maximum Linear Arrangement Problem for trees under projectivity and planarity

no code implementations14 Jun 2022 Lluís Alemany-Puig, Juan Luis Esteban, Ramon Ferrer-i-Cancho

In the projective variant for rooted trees, arrangements have to be planar and the root of the tree cannot be covered by any edge.

The Linear Arrangement Library. A new tool for research on syntactic dependency structures

1 code implementation5 Dec 2021 Lluís Alemany-Puig, Juan Luis Esteban, Ramon Ferrer-i-Cancho

One of the main concerns in this field is the statistical patterns of syntactic dependency structures.

Linear-time calculation of the expected sum of edge lengths in random projective linearizations of trees

no code implementations CL (ACL) 2022 Lluís Alemany-Puig, Ramon Ferrer-i-Cancho

Thus far, the expectation of the sum of dependency distances in random projective shufflings of a sentence has been estimated approximately with a Monte Carlo procedure whose cost is of the order of $Rn$, where $n$ is the number of words of the sentence and $R$ is the number of samples; it is well known that the larger $R$, the lower the error of the estimation but the larger the time cost.

Sentence

Minimum projective linearizations of trees in linear time

no code implementations5 Feb 2021 Lluís Alemany-Puig, Juan Luis Esteban, Ramon Ferrer-i-Cancho

Gildea and Temperley (GT) sketched an algorithm for projective arrangements which they claimed runs in $O(n)$ but did not provide any justification of its cost.

The optimality of syntactic dependency distances

2 code implementations30 Jul 2020 Ramon Ferrer-i-Cancho, Carlos Gómez-Rodríguez, Juan Luis Esteban, Lluís Alemany-Puig

Here we recast the problem of the optimality of the word order of a sentence as an optimization problem on a spatial network where the vertices are words, arcs indicate syntactic dependencies and the space is defined by the linear order of the words in the sentence.

Sentence

Fast calculation of the variance of edge crossings in random arrangements

no code implementations6 Mar 2020 Lluís Alemany-Puig, Ramon Ferrer-i-Cancho

The crossing number of a graph $G$, $\mathrm{cr}(G)$, is the minimum number of edge crossings arising when drawing a graph on a certain surface.

Computation Discrete Mathematics Data Structures and Algorithms Combinatorics

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