Zobrazeno 1 - 10
of 2 104
pro vyhledávání: '"Cristina, María"'
We introduce two new classes of single-valued contractions of polynomial type defined on a metric space. For the first one, called the class of polynomial contractions, we establish two fixed point theorems. Namely, we first consider the case when th
Externí odkaz:
http://arxiv.org/abs/2406.03446
Autor:
Valcu, Cristina-Maria, Scheltema, Richard A., Schweiggert, Ralf M., Valcu, Mihai, Teltscher, Kim, Walther, Dirk M., Carle, Reinhold, Kempenaers, Bart
Publikováno v:
Communications Biology (2019) 2:6
Maternal investment directly shapes early developmental conditions and therefore has longterm fitness consequences for the offspring. In oviparous species prenatal maternal investment is fixed at the time of laying. To ensure the best survival chance
Externí odkaz:
http://arxiv.org/abs/2405.20359
Publikováno v:
Fixed Point Theory 2024
We are concerned with the study of fixed points for mappings $T: X\to X$, where $(X,G)$ is a $G$-metric space in the sense of Mustafa and Sims. After the publication of the paper [Journal of Nonlinear and Convex Analysis. 7(2) (2006) 289--297] by Mus
Externí odkaz:
http://arxiv.org/abs/2405.11648
In this paper we introduce and study new classes of mappings in metric spaces. The main class of mappings is called generalized orbital triangular contractions and it generalizes some existing results (such as Banach contractions, mappings contractin
Externí odkaz:
http://arxiv.org/abs/2404.15682
Autor:
Scaloni, Letizia, Rodighiero, Giulia, Enia, Andrea, Gruppioni, Carlotta, Annibali, Francesca, Bisigello, Laura, Cassata, Paolo, Corsini, Enrico Maria, Casasola, Viviana, Lofaro, Cristina Maria, Bianchetti, Alessandro
Publikováno v:
Astronomy & Astrophysics, Volume 687, July 2024, id.A255, 15 pp
Stellar bars are common morphological structures in the local Universe; according to optical and NIR surveys, they are present in about two-thirds of disc galaxies. These elongated structures are also believed to play a crucial role in secular evolut
Externí odkaz:
http://arxiv.org/abs/2404.11656
We introduce a new type of mappings in metric space which are three-point analogue of the well-known Chatterjea type mappings, and call them generalized Chatterjea type mappings. It is shown that such mappings can be discontinuous as is the case of C
Externí odkaz:
http://arxiv.org/abs/2404.00782
The aim of the current paper is to introduce a new class of contractive mappings, which are contracting (a feature of) triangles. We prove that maps contracting triangles are continuous and give the fixed point result for such mappings. We emphasize
Externí odkaz:
http://arxiv.org/abs/2403.19488
Autor:
Lofaro, Cristina Maria, Rodighiero, Giulia, Enia, Andrea, Werle, Ariel, Bisigello, Laura, Cassata, Paolo, Casasola, Viviana, Renzini, Alvio, Scaloni, Letizia, Bianchetti, Alessandro
The main sequence (MS) of star-forming galaxies (SFGs) is the tight relation between the galaxy stellar mass and its star formation rate (SFR) and was observed up to z ~ 6. The MS relation can be used as a reference for understanding the differences
Externí odkaz:
http://arxiv.org/abs/2403.18156
Autor:
Baicoianu, Alexandra, Gavrilă, Cristina Gabriela, Pacurar, Cristina Maria, Pacurar, Victor Dan
This paper focuses on the hypothesis of optimizing time series predictions using fractal interpolation techniques. In general, the accuracy of machine learning model predictions is closely related to the quality and quantitative aspects of the data u
Externí odkaz:
http://arxiv.org/abs/2403.00403
Autor:
Savona, Roberto, Alberini, Cristina Maria, Alessi, Lucia, Baussano, Iacopo, Dellaportas, Petros, Guerra, Ranieri, Khozin, Sean, Modena, Andrea, Pecorelli, Sergio, Rasi, Guido, Siviero, Paolo Daniele, Stein, Roger M.
A major gap exists between the conceptual suggestion of how much a nation should invest in science, innovation, and technology, and the practical implementation of what is done. We identify 4 critical challenges that must be address in order to devel
Externí odkaz:
http://arxiv.org/abs/2312.07065