Results 71 to 80 of about 3,799,599 (344)

On fixed points of rational contractions in generalized parametric metric and fuzzy metric spaces

open access: yesJournal of Inequalities and Applications, 2021
We introduce the notion of generalized parametric metric spaces along with the study of its various properties. Further, we prove some new fixed point theorems for ( α , ψ ) $(\alpha ,\psi )$ -rational-type contractive mappings in generalized parametric ...
Thounaojam Stephen   +5 more
doaj   +1 more source

Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?

open access: yesFEBS Letters, EarlyView.
This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes   +3 more
wiley   +1 more source

Bounded Rational Points on Curves [PDF]

open access: yesInternational Mathematics Research Notices, 2014
We establish the sharp estimate <
openaire   +2 more sources

Diophantine approximation on manifolds and the distribution of rational points: contributions to the convergence theory [PDF]

open access: yes, 2015
In this paper we develop the convergence theory of simultaneous, inhomogeneous Diophantine approximation on manifolds. A consequence of our main result is that if the manifold $M \subset \mathbb{R}^n$ is of dimension strictly greater than $(n+1)/2$ and ...
V. Beresnevich   +3 more
semanticscholar   +1 more source

On the zeros and critical points of a rational map

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
Let f:ℙ1→ℙ1 be a rational map of degree d. It is well known that f has d zeros and 2d−2 critical points counted with multiplicities. In this note, we explain how those zeros and those critical points are related.
Xavier Buff
doaj   +1 more source

On θ-Congruent Numbers, Rational Squares in Arithmetic Progressions, Concordant Forms and Elliptic Curves

open access: yesMathematics, 2015
The correspondence between right triangles with rational sides, triplets of rational squares in arithmetic succession and integral solutions of certain quadratic forms is well-known.
Erich Selder, Karlheinz Spindler
doaj   +1 more source

Asymptotic Frame Fields of Rational Bézier Curves

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2021
Bézier curves are a type of curves used in computer aided design and related fields. The curves can be defined with the help of De Casteljau algorithm, which is one of the most basic elements of curve and surface design, and Bernstein polynomials, which ...
Tunahan Turhan   +2 more
doaj   +1 more source

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

open access: yesFEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas   +3 more
wiley   +1 more source

Rational points on log Fano threefolds over a finite field [PDF]

open access: yesJournal of the European Mathematical Society (Print), 2015
We prove the $W\mathcal{O}$-rationality of klt threefolds and the rational chain connectedness of klt Fano threefolds over a perfect field of characteristic $p>5$. As a consequence, any klt Fano threefold over a finite field has a rational point.
Yoshinori Gongyo   +2 more
semanticscholar   +1 more source

Common Fixed Points of (α,η) − (θ,ϝ) Rational Contractions with Applications

open access: yesJournal of Mathematics, 2019
We present the notion of set valued (α,η)-(θ,ϝ) rational contraction mappings and then some common fixed point results of such mappings in the setting of metric spaces are established.
Mujahid Abbas   +2 more
doaj   +1 more source

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