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Fixed point combinators as fixed points of higher-order fixed point generators [PDF]

open access: yesLogical Methods in Computer Science, 2020
Corrado B\"ohm once observed that if $Y$ is any fixed point combinator (fpc), then $Y(\lambda yx.x(yx))$ is again fpc. He thus discovered the first "fpc generating scheme" -- a generic way to build new fpcs from old.
Andrew Polonsky
doaj   +6 more sources

Approximating fixed points of enriched nonexpansive mappings by Krasnoselskij iteration in Hilbert spaces [PDF]

open access: bronzeCarpathian Journal of Mathematics, 2019
Using the technique of enrichment of contractive type mappings by Krasnoselskij averaging, presented here for the first time, we introduce and study the class of enriched nonexpansive mappings in Hilbert spaces.
Vasile Berinde
openalex   +3 more sources

Suspended fixed points

open access: yesNuclear Physics B, 2022
We study the orientifold of the N=1 superconformal field theories describing D3-branes probing the Suspended Pinch Point singularity, as well as the orientifolds of non-chiral theories obtained by a specific orbifold Zn of SPP.
Andrea Antinucci   +3 more
doaj   +6 more sources

Nonequilibrium Fixed Points of Coupled Ising Models. [PDF]

open access: yesPhys Rev X, 2020
Driven-dissipative systems are expected to give rise to nonequilibrium phenomena that are absent in their equilibrium counterparts. However, phase transitions in these systems generically exhibit an effectively classical equilibrium behavior in spite of ...
Young JT   +3 more
europepmc   +3 more sources

Coarse Graining, Fixed Points, and Scaling in a Large Population of Neurons. [PDF]

open access: yesPhys Rev Lett, 2019
We develop a phenomenological coarse-graining procedure for activity in a large network of neurons, and apply this to recordings from a population of 1000+ cells in the hippocampus.
Meshulam L   +4 more
europepmc   +3 more sources

Global Wilson–Fisher fixed points [PDF]

open access: yesNuclear Physics B, 2017
The Wilson–Fisher fixed point with O(N) universality in three dimensions is studied using the renormalisation group. It is shown how a combination of analytical and numerical techniques determine global fixed points to leading order in the derivative ...
Andreas Jüttner   +2 more
doaj   +2 more sources

Object Representations as Fixed Points: Training Iterative Refinement Algorithms with Implicit Differentiation [PDF]

open access: yesNeural Information Processing Systems, 2022
Iterative refinement -- start with a random guess, then iteratively improve the guess -- is a useful paradigm for representation learning because it offers a way to break symmetries among equally plausible explanations for the data. This property enables
Michael Chang, T. Griffiths, S. Levine
semanticscholar   +1 more source

Attractor and fixed points in Bjorken flows [PDF]

open access: yesPhysical Review C, 2021
Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE) & Institute of Modern Physics Fudan University, 220 Handan Road, 200433, Yangpu District, Shanghai, China Abstract We consider a plasma of massless particles undergoing Bjorken expansion ...
J. Blaizot, Li Yan
semanticscholar   +1 more source

Approximating fixed points of enriched contractions in Banach spaces [PDF]

open access: yesJournal of Fixed Point Theory and Applications, 2019
We introduce a large class of contractive mappings, called enriched contractions, a class which includes, amongst many other contractive type mappings, the Picard–Banach contractions and some nonexpansive mappings.
V. Berinde, M. Pacurar
semanticscholar   +2 more sources

Neutrosophic Soft Fixed Points [PDF]

open access: yesNeutrosophic Sets and Systems, 2020
. In a wide spectrum of mathematical issues, the presence of a fixed point (FP) is equal to the presence of a appropriate map solution. Thus in several fields of math and science, the presence of a fixed point is important.
Madad Khan   +4 more
doaj   +1 more source

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