Results 21 to 30 of about 5,021,065 (259)

ec-Filters and ec-ideals in the functionally countable subalgebra of C*(X)

open access: yesApplied General Topology, 2019
The purpose of this article is to study and investigate ec-filters on X and ec-ideals in C*c (X) in which they are in fact the counterparts of zc-filters on X and zc-ideals in Cc(X) respectively.
Amir Veisi
doaj   +1 more source

The index complex of a maximal subalgebra of a Lie algebra. [PDF]

open access: yes, 2011
Let M be a maximal subalgebra of the Lie algebra L. A subalgebra C of L is said to be a completion for M if C is not contained in M but every proper subalgebra of C that is an ideal of L is contained in M.
Towers, David A.
core   +5 more sources

The significance of the Hansen Ideal space frame [PDF]

open access: yes, 2012
Known and unknown properties of Hansen Ideal coordinates are summarized. It is shown that the ideal space frame is a general and necessary component of basic celestial mechanics and astrodynamics, as well as of any theory of motion. A typical consequence
Jochim, Fritz
core   +1 more source

Ideals in B1(X) and residue class rings of B1(X) modulo an ideal

open access: yesApplied General Topology, 2019
This paper explores the duality between ideals of the ring B1(X) of all real valued Baire one functions on a topological space X and typical families of zero sets, called ZB-filters, on X.
A. Deb Ray, Atanu Mondal
doaj   +1 more source

Optimal detection of ultra-broadband bi-photons with quantum nonlinear SU(1,1) interference

open access: yesNew Journal of Physics, 2021
The visibility of nonlinear SU(1,1) interference directly reflects the nonclassical properties of entangled bi-photons and squeezed light with practically unlimited bandwidth, high efficiency and ultra-high photon flux, orders of magnitude beyond the ...
Nir Nechushtan   +3 more
doaj   +1 more source

On I-quotient mappings and I-cs'-networks under a maximal ideal

open access: yesApplied General Topology, 2020
Let I be an ideal on N and f : X → Y be a mapping. f is said to be an I-quotient mapping provided f−1(U) is I-open in X, then U is I-open in Y . P is called an I-cs′-network of X if whenever {xn}n∈N is a sequence I-converging to a point x ∈ U with U open
Xiangeng Zhou
doaj   +1 more source

Maximal functions and subordination for operator groups. [PDF]

open access: yes, 2002
Let E be a UMD Banach space and L a positive and self-adjoint operator in L^2 of Laplace type such that the imaginary powers L^{-it} form a C_0 group of exponential growth on L^p(E).
Blower, Gordon
core   +4 more sources

A class of ideals in intermediate rings of continuous functions

open access: yesApplied General Topology, 2019
For  any  completely  regular  Hausdorff  topological  space X,  an  intermediate  ring A(X) of  continuous  functions  stands  for  any  ring  lying between C∗(X) and C(X).
Sagarmoy Bag   +2 more
doaj   +1 more source

Surya namaskar: As an alternative for aerobic fitness

open access: yesInternational Journal of Yoga, 2022
Context: “Surya Namaskar” (SN) may be used as a need-based short-duration aerobic activity in a confined space to establish as a substitute of an equivalent routine physical training in challenging stressful conditions. Materials and Methods: Noninvasive
Abhishek Bandyopadhyay   +4 more
doaj   +1 more source

On the reducible $M$-ideals in Banach spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2017
The object of the investigation is to study reducible $M$-ideals in Banach spaces. It is shown that if the number of $M$-ideals in a Banach space $X$ is $n(
Sajad Khorshidvandpour   +1 more
doaj  

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