Results 81 to 90 of about 2,777,888 (247)

Approximation of complex algebraic numbers by algebraic numbers of bounded degree [PDF]

open access: yes, 2007
We investigate how well complex algebraic numbers can be approximated by algebraic numbers of degree at most n. We also investigate how well complex algebraic numbers can be approximated by algebraic integers of degree at most n+1.
Bugeaud, Yann, Evertse, Jan-Hendrik
core   +1 more source

Algebraic Structure of Graph Operations in Terms of Degree Sequences

open access: yesInternational Journal of Analysis and Applications, 2018
In this paper, by means of the degree sequences (DS) of graphs and some graph theoretical and combinatorial methods, we determine the algebraic structure of the set of simple connected graphs according to two graph operations, namely join and Corona ...
Vishnu Narayan Mishra   +2 more
doaj   +2 more sources

An Algebraic Index Theorem for Non-smooth Economies [PDF]

open access: yes
In this paper, we prove an existence theorem for equilibria in production economies with increasing returns, which generalizes the classic results on this topic.
Gaël Giraud
core  

A case of monoidal uniqueness of algebraic models [PDF]

open access: yes, 2015
We prove that there is at most one algebraic model for modules over the K(1)-local sphere at odd primes that retains some monoidal ...
Roitzheim, Constanze   +1 more
core   +1 more source

Artificial Intelligence for Advanced Functional Materials: Progress and Emerging Frontiers

open access: yesAdvanced Intelligent Systems, EarlyView.
Artificial intelligence is transforming the discovery of functional materials by linking synthesis, characterization, simulation, and design in unified workflows. Advances in machine learning, autonomous experimentation, and foundation models are accelerating innovation across energy, electronics, and biomedicine, while revealing new frontiers for ...
Cristiano Malica   +38 more
wiley   +1 more source

Construction of highly nonlinear Boolean functions with four-valued and five-valued spectra

open access: yesTongxin xuebao
Boolean functions with four-valued and five-valued spectra are of special interest for cryptography applications. By modifying bent functions in the Maiorana-McFarland class, a construction of Boolean functions on even numbers of variables with four ...
GUO Fei, WANG Zilong, DUAN Ming
doaj  

Designing Wire Mazes for Replicating Natural Echoes to Study Bat Biosonar Function

open access: yesAdvanced Intelligent Systems, EarlyView.
A validated framework combining efficient physical modeling (multiple scattering model) and deep learning is presented to guide wire‐maze design for bat biosonar studies. This approach rapidly generates large datasets to test acoustic distinguishability among wire arrangements.
Chunlin Jia   +3 more
wiley   +1 more source

It Is Better to Be Semi-Regular When You Have a Low Degree

open access: yesEntropy
We study the algebraic connectivity for several classes of random semi-regular graphs. For large random semi-regular bipartite graphs, we explicitly compute both their algebraic connectivity as well as the full spectrum distribution. For an integer d∈3,7,
Theodore Kolokolnikov
doaj   +1 more source

Competitive Equilibria in Semi-Algebraic Economies [PDF]

open access: yes
This paper examines the equilibrium correspondence in Arrow-Debreu exchange economies with semi-algebraic preferences. We show that a generic semi-algebraic exchange economy gives rise to a square system of polynomial equations with finitely many ...
Karl Schmedders, Felix Kuber
core  

The Herfindahl neutral point: A firm‐level threshold for managing market concentration with evidence from US hog packing

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract This paper derives a firm‐level threshold, the Herfindahl Neutral Point, from the standard concentration index used in merger review. At this threshold, a marginal expansion leaves the index unchanged. Firms below the threshold reduce concentration when they expand; firms above it increase concentration.
Andrew J. Keller, Krishna P. Paudel
wiley   +1 more source

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