Results 21 to 30 of about 116 (98)

A regression‐based waveform interpretation model for accurate soil moisture estimation under incomplete time domain reflectometry probe insertions

open access: yesVadose Zone Journal, Volume 25, Issue 3, May/June 2026.
Abstract Time domain reflectometry (TDR) is widely used and provides accurate estimates of soil moisture when sensor rods are fully inserted into the soil. However, automation of sensor insertions, especially in field conditions, is hindered by inaccuracies caused by possible incomplete sensor rod insertion, which distorts waveforms and leads to ...
Ousswa Chouchane   +5 more
wiley   +1 more source

Tensor Characterizations of Summing Polynomials [PDF]

open access: yes, 2018
[EN] Operators T that belong to some summing operator ideal, can be characterized by means of the continuity of an associated tensor operator T that is de¿ned between tensor products of sequences spaces.
Pilar Rueda   +7 more
core   +1 more source

A note on relative Gelfand–Fuks cohomology of spheres

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.
Abstract We study the Gelfand–Fuks cohomology of smooth vector fields on Sd$\mathbb {S}^d$ relative to SO(d+1)$\mathrm{SO}(d+1)$ following a method of Haefliger that uses tools from rational homotopy theory. In particular, we show that H∗(BSO(4);R)$H^*(\mathrm{B}\mathrm{SO}(4);\mathbb {R})$ injects into the relative Gelfand–Fuks cohomology which ...
Nils Prigge
wiley   +1 more source

On factorization of Hilbert–Schmidt mappings

open access: yes, 2005
We present some results on factorization of Hilbert–Schmidt multilinear mappings and polynomials through infinite dimensional Banach spaces, L1 and L∞ spaces. We conclude this work with a result on factorization of holomorphic mappings of Hilbert–Schmidt
Mendes, Cristiane A.
core   +1 more source

Polynomial identities for quivers via incidence algebras

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.
Abstract We show that the path algebra of a quiver satisfies the same polynomial identities (PI) of an algebra of matrices, if any. In particular, the algebra of n×n$n\times n$ matrices is PI‐equivalent to the path algebra of the oriented cycle with n$n$ vertices.
Allan Berele   +3 more
wiley   +1 more source

Bounded and unbounded polynomials and multilinear forms: Characterizing continuity

open access: yes, 2011
In this paper we prove a characterization of continuity for polynomials on a normed space. Namely, we prove that a polynomial is continuous if and only if it maps compact sets into compact sets.
Gámez Merino, José Luis   +10 more
core   +1 more source

Triggered Ferroelectricity in HfO2 From Hybrid Phonons and Higher‐Order Dynamical Charges

open access: yesAdvanced Materials, Volume 38, Issue 19, 1 April 2026.
We combine first‐principles calculations, LGD theory and group theory to demonstrate the mechanism of hybrid‐triggered ferroelectricity in HfO2${\rm HfO}_2$, enabled by trilinear and quadlinear couplings between stable polar and nonpolar modes. HfO2${\rm HfO}_2$ hosts unconventional interplay between structure modes where substantial contribution to ...
Seongjoo Jung, Turan Birol
wiley   +1 more source

Unitarily invariant valuations on convex functions

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract Continuous, dually epi‐translation invariant valuations on the space of finite‐valued convex functions on Cn$\mathbb {C}^n$ that are invariant under the unitary group are investigated. It is shown that elements belonging to the dense subspace of smooth valuations admit a unique integral representation in terms of two families of Monge–Ampère ...
Jonas Knoerr
wiley   +1 more source

Qubit‐Efficient Quantum Local Search for Combinatorial Optimization

open access: yesAdvanced Quantum Technologies, Volume 9, Issue 3, March 2026.
We introduce a qubit‐efficient variational quantum algorithm for combinatorial optimization that adaptively uses from logarithmic to a linear number of qubits to implement quantum local search. The method encodes flip probabilities of spin groups into quantum amplitudes, enabling exploration of classically intractable neighborhoods while maintaining ...
Mikhail Podobrii   +4 more
wiley   +1 more source

Massive Spanning Forests on the Complete Graph: Exact Distribution and Local Limit

open access: yesRandom Structures &Algorithms, Volume 68, Issue 2, March 2026.
ABSTRACT We provide new exact formulas for the distribution of massive spanning forests on the complete graph, which give also a new outlook on the celebrated special case of the uniform spanning tree. As a corollary we identify their local limit. This generalizes a well‐known theorem of Grimmett on the local limit of uniform spanning trees on the ...
Matteo D'Achille   +2 more
wiley   +1 more source

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