Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas
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Extension procedures for lattice Lipschitz operators on Euclidean spaces
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 117 - Trang 1-16 - 2023
We present a new class of Lipschitz operators on Euclidean lattices that we call
lattice Lipschitz maps, and we prove that the associated McShane and Whitney
formulas provide the same extension result that holds for the real valued case.
Essentially, these maps satisfy a (vector-valued) Lipschitz inequality involving
the order of the lattice, with the peculiarity that the usual Lipschitz constant
...
A counterexample to the Fortune’s Formula investing method
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 113 - Trang 749-767 - 2018
The classical Kelly investment method consists in betting a fixed fraction
$$f^*$$ of wealth which maximizes the expected log growth rate. The strategy was
introduced in 1956 by Kelly and applied effectively to financial investments by
Edward O. Thorp and others. In this paper, we determine a large class of
n-valued financial games, $$n\ge 3$$ , where the use of a simplified parameter
$$\widehat{f...
Wavelet multiplier associated with the Watson transform
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 117 - Trang 1-21 - 2022
In this paper, the $$L^{p}$$ -boundedness, compactness and Hilbert–Schmidt class
of wavelet multiplier associated with the Watson transform are investigated and
its various properties studied. Landau–Pollak Slepian operator associated with
the Watson transform is discussed as an application of wavelet multiplier. The
relation between Watson wavelet multipliers and Sobolev space is given and trace
...
On C-totally real minimal submanifolds of the Sasakian space forms with parallel Ricci tensor
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 116 - Trang 1-25 - 2022
Cheng et al. recently (Results Math 76:144, 2021) established a complete
classification of the n-dimensional C-totally real minimal submanifolds with
constant sectional curvature in the $$(2n+1)$$ -dimensional Sasakian space form
$$N^{2n+1}(c)$$ . In this paper, trying to extend the above result, we classify
C-totally real minimal submanifolds in $$N^{2n+1}(c)$$ with parallel Ricci
tensor for $$n=...
Nonorientable, incompressible surfaces in punctured-torus bundles over $$S^1$$
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 113 - Trang 1975-2000 - 2018
We classify incompressible, $$\partial $$ -incompressible, nonorientable
surfaces in punctured-torus bundles over $$S^1$$ . We use the ideas of Floyd,
Hatcher, and Thurston. The main tool is to put our surface in the “Morse
position” with respect to the projection of the bundle into the basis $$S^1$$ ....
Differential subordination associated with generalized Mittag-Leffler function
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 113 - Trang 435-452 - 2018
A new operator $$\mathcal {E}^\gamma _{\alpha ,\beta }f(z)$$ associated with the
generalized Mittag-Leffler function $$E^\gamma _{\alpha ,\beta }(z)$$ is defined
in the unit disk. Second-order differential subordination results for operator
$$\mathcal {E}^\gamma _{\alpha ,\beta }f(z)$$ are obtained by investigating
appropriate classes of admissible functions. Inequalities for normalized
Mitttag-Le...
Infinitely many solutions for nonlinear periodic boundary value problem with impulses
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - - 2017
Vấn đề bậc hai đối với lý thuyết trường Lagrangian k-presymplectic: ứng dụng cho mô hình Einstein–Palatini Dịch bởi AI
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 116 Số 1 - 2022
Tóm tắtNói chung, hệ thống các phương trình vi phân riêng bậc hai được tạo thành
từ các phương trình Euler–Lagrange của lý thuyết trường cổ điển không tương
thích đối với các Lagrangian kỳ dị. Đây được gọi là vấn đề bậc hai. Mục tiêu đầu
tiên của công trình này là phát triển một thuật toán ràng buộc hình học hoàn
chỉnh cho phép chúng tôi tìm một tiểu đa tạp nơi các phương trình Euler–Lagrange
có n...
Applications of fluid flow matrix analytic methods in ruin theory —a review
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 103 - Trang 353-372 - 2009
In this paper, we present a unified probabilistic approach to analyze a wide
class of insurance risk models in a ruin theoretical context. Contrary to the
traditional analytic approach mainly encountered in the literature, this
alternative approach is based on matrix analytic methods (MAMs) that have become
an increasingly popular set of tools in the study of various applied probability
models. We...
The core inverses of differences and products of projections in rings with involution
Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas - Tập 113 - Trang 3283-3296 - 2019
Let R be a unital ring with involution. The core inverses of differences and
products of projections in R are investigated. Let $$p, q\in R$$ be two
projections, we obtained equivalent conditions such that $$p-q$$, $$(p-q)^2$$,
$$1-qp$$, $$pq+qp$$ and $$(pq-qp)^2$$ are core invertible, respectively.
Moreover, expressions for their core inverses are given.
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