wovepaper — the arXiv observatory

papers

Publications (10)

math.RT2012

The dual space of precompact groups

M. Ferrer, S. HernÃ¡ndez, V. Uspenskij

For any topological group $G$ the dual object $G^$ is defined as the set of equivalence classes of irreducible unitary representations of $G$ equipped with the Fell topology. I…

astro-ph.HE2026

Searches for Binary Mergers with Sub-solar Mass Components in Data from the First Part of LIGO--Virgo--KAGRA's Fourth Observing Run

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1834

We report on a gravitational wave search for compact binary coalescences involving at least one component with mass between $0.2 M_{⊙}$ to $1 M_{⊙}$ , and ratio of component m…

gr-qc2026

All-sky Searches for Continuous Gravitational Waves from Isolated Neutron Stars in the Data from the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1826

We present results from an all-sky search for continuous gravitational waves, using three different methods applied to the first eight months of LIGO data from the fourth LIGO-Virg…

gr-qc2026

Narrowband searches for continuous gravitational waves from known pulsars in the first two parts of the fourth LIGO--Virgo--KAGRA observing run

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1853

Rotating non-axisymmetric neutron stars (NSs) are promising sources for continuous gravitational waves (CWs). Such CWs can, if detected, inform us about the internal structure and…

math.GN2012

Precompact groups and property (T)

M. Ferrer, S. HernÃ¡ndez, V. Uspenskij

For any topological group $G$ the dual object $G^$ is defined as the set of equivalence classes of irreducible unitary representations of $G$ equipped with the Fell topology. I…

astro-ph.HE2026

Sub-Torque-Balance Upper Limits on Continuous Gravitational Waves from Scorpius X-1

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1836

We present the results of a search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1 using LIGO data from the first part of the fourth LIGO-Virgo-KAGRA…

math.GR2024

The Baire property and precompact duality

M. Ferrer, S. HernÃ¡ndez, I. SepÃºlveda +1

We prove that if $G$ is a totally bounded abelian group \st\ its dual group $G_{p}$ equipped with the finite-open topology is a Baire group, then every compact subset of $G…

eess.AS2021

Acoustic Echo Cancellation using Residual U-Nets

J. Silva-RodrÃguez, M. F. Dolz, M. Ferrer +3

This paper presents an acoustic echo canceler based on a U-Net convolutional neural network for single-talk and double-talk scenarios. U-Net networks have previously been used in t…

gr-qc2026

Constraints on gravitational waves from the 2024 Vela pulsar glitch

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1774

Among known neutron stars, the Vela pulsar is one of the best targets for gravitational-wave searches. It is also one of the most prolific in terms of glitches, sudden frequency ch…

gr-qc2026

GW240925 and GW250207: Astrophysical Calibration of Gravitational-wave Detectors

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1839

GW240925 and GW250207 are two loud gravitational-wave signals from binary black hole coalescences observed with network signal-to-noise ratios $\sim 32$ and $\sim 69$ , respectively…