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Extrapolation in general quasi-Banach function spaces
(2023-11-15)
In this work we prove off-diagonal, limited range, multilinear, vector-valued, and two-weight versions of the Rubio de Francia extrapolation theorem in general quasi-Banach function spaces. We prove mapping properties of ...
Lifespan estimates for the compressible Euler equations with damping via Orlicz spaces techniques
(2023-10-06)
In this paper we are interested in the upper bound of the lifespan estimate for the compressible Euler system with time dependent damping and small initial perturbations.
We employ some techniques from the blow-up study ...
On C0 and C1 continuity of envelopes of rotational solids and its application to 5-axis CNC machining
(2023-10)
We study the smoothness of envelopes generated by motions of rotational rigid bodies in the context of 5-axis Computer Numerically Controlled (CNC) machining. A moving cutting tool, conceptualized as a rotational solid, ...
Weighted BMO estimates for singular integrals and endpoint extrapolation in Banach function spaces
(2023-05-01)
In this paper we prove sharp weighted BMO estimates for singular integrals, and we show how such estimates can be extrapolated to Banach function spaces.
Weighted Lorentz spaces: Sharp mixed A<inf>p</inf> − A<inf>∞</inf> estimate for maximal functions
(2023-03-15)
We prove the sharp mixed Ap−A∞ weighted estimate for the Hardy-Littlewood maximal function in the context of weighted Lorentz spaces, namely [Formula presented] where [Formula presented]. Our method is rearrangement free ...
Lattice points problem, equidistribution and ergodic theorems for certain arithmetic spheres
(2023-01-01)
We establish an asymptotic formula for the number of lattice points in the sets Sh1,h2,h3(λ):={x∈Z+3:⌊h1(x1)⌋+⌊h2(x2)⌋+⌊h3(x3)⌋=λ} with λ∈Z+; where functions h1, h2, h3 are constant multiples of regularly varying functions ...