Results 111 to 120 of about 4,892,851 (274)
Temporal pulse shaping aspects of refractive X‐ray lenses
Journal of Synchrotron Radiation, Volume 33, Issue 1, Page 52-62, January 2026.This work investigates the temporal effects of refractive X‐ray lenses on ultra‐short pulses from X‐ray free‐electron lasers. Using both a full Fresnel theory model and a simplified ray‐tracing approach, the paper analyzes the pulse elongation and spatio‐temporal distortions introduced by these focusing optics.Refractive X‐ray lenses are frequently ...
Fabian Trost +2 more
wiley +1 more source
On the weak uniform rotundity of Banach spaces
International Journal of Mathematics and Mathematical Sciences, 2003 We prove that if Xi,i=1,2,…, are Banach spaces that are weak* uniformly rotund, then their lp product space (p>1) is weak* uniformly rotund, and for any weak or weak* uniformly rotund Banach space, its quotient space is also weak or weak* uniformly ...
Wen D. Chang, Ping Chang
doaj +1 more source
Intertwining conditions for two isometries on Banach space [PDF]
, 2022 Heybetkulu Mustafayev
openalex +1 more source
Unified Asymptotics for Investment Under Illiquidity: Transaction Costs and Search Frictions
Mathematical Finance, Volume 36, Issue 1, Page 67-98, January 2026.ABSTRACT This paper investigates the optimal investment problem in a market with two types of illiquidity: transaction costs and search frictions. We analyze a power‐utility maximization problem where an investor encounters proportional transaction costs and trades only when a Poisson process triggers trading opportunities.
Tae Ung Gang, Jin Hyuk Choi
wiley +1 more source
Some properties of Banach-valued sequence spaces ℓp[X]
International Journal of Mathematics and Mathematical Sciences, 2001 We discuss some properties of the Banach-valued sequence space ℓp[X](1 ...
Qingying Bu
doaj +1 more source
Large‐Amplitude Periodic Solutions to the Steady Euler Equations With Piecewise Constant Vorticity
Studies in Applied Mathematics, Volume 156, Issue 1, January 2026.ABSTRACT We consider steady solutions to the incompressible Euler equations in a two‐dimensional channel with rigid walls. The flow consists of two periodic layers of constant vorticity separated by an unknown interface. Using global bifurcation theory, we rigorously construct curves of solutions that terminate either with stagnation on the interface ...
Alex Doak +3 more
wiley +1 more source
Plank theorems and their applications: A survey
Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.Abstract Plank problems concern the covering of convex bodies by planks in Euclidean space and are related to famous open problems in convex geometry. In this survey, we introduce plank problems and present surprising applications of plank theorems in various areas of mathematics.
William Verreault
wiley +1 more source
The Compact Approximation Property does not imply the Approximation Property
, 1992 It is shown how to construct, given a Banach space which does not have the approximation property, another Banach space which does not have the approximation property but which does have the compact approximation ...
Willis, George A.
core
New results in the perturbation theory of maximal monotone and $M$-accretive operators in Banach spaces [PDF]
, 1996 Athanassios G. Kartsatos
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Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.Abstract In this paper, we consider a class of higher‐order equations and show a sharp upper bound on fractional powers of unbounded linear operators associated with higher‐order abstract equations in Hilbert spaces.
Flank D. M. Bezerra +2 more
wiley +1 more source