Results 141 to 150 of about 13,233,408 (362)
The undecidability of unification in third order logic
Information and Control, 1973 The problem of the existence of a unifying substitution between two terms is considered in type theory. This problem is shown to be undecidable, even if we restrict the objects of the language to third order. This means that we are not able to recognize whether two terms have a common instance or not.
openaire +3 more sources
Realization and topological properties of third-order exceptional lines embedded in exceptional surfaces. [PDF]
Nat Commun, 2023 Tang W, Ding K, Ma G.
europepmc +1 more source
Amyotrophic Lateral Sclerosis Prevalence Projection in 2040: A Less Rare Disease
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To project ALS prevalence across multiple countries through 2040, accounting for both population aging and increased survival. Methods Data from the Piemonte and Valle d'Aosta ALS register (PARALS) was used to estimate the trends in incidence and prevalence from 2005 to 2019. Survival trends over this period were also assessed.
Rosario Vasta +18 more
wiley +1 more source
Stability for a third order Sine-Gordon equation [PDF]
Rendiconti di Matematica e delle Sue Applicazioni, 1998 We first analyze an initial-boundary-value problem for a nonlinear higher order equation. Then, we discuss several stability properties basing on the Liapunov second method. We give examples from the Superconductor Theory and Quantum Mechanics. Moreover,
B. D’Acunto, A. D’Anna
doaj
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives To evaluate the utility of cerebrospinal fluid (CSF) biomarkers—matrix metalloproteinase‐9 (MMP‐9), tissue inhibitor of metalloproteinases‐1 (TIMP‐1), the MMP‐9/TIMP‐1 ratio, and osteopontin (OPN)—as indicators of blood–brain barrier (BBB) integrity and disease activity in people with relapsing–remitting multiple sclerosis (pwMS ...
Ivan Pavlovic +6 more
wiley +1 more source
Third-Order Elastic Constants and the Velocity of Small Amplitude Elastic Waves in Homogeneously Stressed Media [PDF]
, 1964 R. N. Thurston, K. Brugger
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Third-Order Nonlinear Optical Properties of Aqueous Silver Sulfide Quantum Dots. [PDF]
J Phys Chem Lett, 2023 Gordel-Wójcik M +4 more
europepmc +1 more source
The Relationship Between Inflammation and Central Nervous System in Multiple Sclerosis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Aim Multiple sclerosis is an autoimmune demyelination disease that is seen especially in the young population and has a progressive course, causing motor, sensory, and cognitive deficits. In the literature, the pathogenesis of MS disease and the interconnection between the immune and central nervous system in the disease have not been fully ...
Gamze Ansen +5 more
wiley +1 more source
Improved oscillation conditions for third-order neutral type difference equations
Electronic Journal of Differential Equations, 2017 In this article, we study the oscillatory behavior of the third-order neutral type difference equation $$ \Delta(a_n(\Delta^2(x_n+p_nx_{n-k}))^{\alpha})+q_nf(x_{n-l})=0 $$ where $\alpha>0$, $a_n>0$, $q_n\geq 0$ and $0\leq p_n\leq ...
Srinivasan Selvarangam +3 more
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Periodic solutions of third order differential equations
Journal of Innovative Applied Mathematics and Computational SciencesIn this paper, we study the existence of periodic solutions for the following piecewise third-order differential equation: $$ \dddot{x}+\dot{x}-\varepsilon\sum\limits_{i=1}^{2}c_i|x|^i=0, $$ with $\varepsilon$ a real parameter sufficiently small, $c_1$
Nabil Rezaiki, Amel Boulfoul
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