Results 51 to 60 of about 1,628 (305)

Contractibility of a persistence map preimage [PDF]

Journal of Applied and Computational Topology, 2020
AbstractThis work is motivated by the following question in data-driven study of dynamical systems: given a dynamical system that is observed via time series of persistence diagrams that encode topological features of snapshots of solutions, what conclusions can be drawn about solutions of the original dynamical system? We address this challenge in the
Jacek Cyranka, Konstantin Mischaikow, Charles Weibel   +2 more
openaire   +3 more sources

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

P-Contractive Mappings On Metric Spaces

, 2018
Altun, Ishak/0000-0002-7967-0554In the present paper, we introduce a new concept of P-contractive mappings on metric spaces. We prove that every ordinary contractive mapping is also P-contractive but the converse may not be true in general. We provide an
Olgun, Murat, Durmaz, Gonca, Altun, Ishak   +2 more
core   +1 more source

A strong convergence theorem on generalized equilibrium problems and strictly pseudocontractive mappings; pp. 12–24 [PDF]

Proceedings of the Estonian Academy of Sciences, 2011
In this paper, we consider a general iterative process for a generalized equilibrium problem and a strictly pseudo-contractive mapping. A strong convergence theorem of common elements of the fixed point sets of the strictly pseudocontractive mapping and ...
Yan Hao
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

Some fixed point results in fuzzy metric spaces using a control function [PDF]

Surveys in Mathematics and its Applications, 2017
In this paper, we establish the results on existence and uniqueness of fixed point for φ-contractive and generalized C-contractive mapping in the fuzzy metric space in the sense of George and Veeramani.
C. T. Aage, Binayak S. Choudhury, Krishnapada Das   +2 more
doaj  

The pyruvate generator is a common phenomenon in mitochondria from different rat and mouse brain regions

FEBS Letters, EarlyView.
The pyruvate generator, which causes activation of respiration by extra‐mitochondrial Ca2+, is also present and functional in rat brainstem mitochondria, as it is in other brain regions. This finding is confirmed by experiments with a fully reconstituted malate–aspartate shuttle (MAS).
Grazyna Debska‐Vielhaber, Niki Karavasili, Matthias Kunz, Zemfira Gizatullina, Timur Gainutdinov, Stefan Vielhaber, Wolfram S. Kunz, Frank N. Gellerich   +7 more
wiley   +1 more source

Atanassov's intuitionistic contractive fuzzy negations

, 2010
In this work we consider the concept of contractive Atanassov's intuitionistic mapping. In particular, we show that with our definitions, the only strict (strong) contractive negation is the standard ...
Humberto Bustince, Glad Deschrijver, Bustince, Humberto, Fernandez, Javier, Mesiar, Radko, Benjamin Bedregal, Radko Mesiar, Deschrijver, Glad, Javier Fernandez, Bedregal, Benjamin   +9 more
core   +1 more source

Fixed Points of Some Asymptotically Regular Multivalued Mappings Satisfying a Kannan-Type Condition

Axioms, 2021
In this paper, we establish some existence of fixed-point results for some asymptotically regular multivalued mappings satisfying Kannan-type contractive condition without assuming compactness of the underlying metric space or continuity of the mapping.
Pradip Debnath, Zoran D. Mitrović, Hari Mohan Srivastava   +2 more
doaj   +1 more source

Diametrically Contractive Multivalued Mappings [PDF]

Fixed Point Theory and Applications, 2007
AbstractDiametrically contractive mappings on a complete metric space are introduced by V. I. Istratescu. We extend and generalize this idea to multivalued mappings. An easy example shows that our fixed point theorem is more applicable than a former one obtained by H. K. Xu.
S. Dhompongsa, H. Yingtaweesittikul
openaire   +4 more sources