Results 91 to 100 of about 481,322 (128)

Approximate Inverses of Operators

Circuits, Systems, and Signal Processing, 2003
Let \(H,K\) be normed spaces with the same system of scalars. The invertibility of linear (respectively nonlinear) operators \(N:H \to K\) is characterized in terms of their approximate inverses and their standard (Lipschitz) operator norm.
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Approximation operators for semiconcepts

Journal of Intelligent & Fuzzy Systems, 2019
For a formal context, we define an equivalence relation on the set of attributes. Through this equivalence relation, we define the lower and upper approximation operators relative to the family of semiconcepts of the formal context. We study on the two operators with the further properties that are interesting and valuable in the theory of rough set ...
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Approximation operators and tauberian constants

Israel Journal of Mathematics, 1969
The explicit expression of the smallest constantC satisfying $$\mathop {lim}\limits_{\lambda \to \infty } \left| {t_{n(\lambda )}^{(1)} - t_{m(\lambda )}^{(2)} } \right| \leqq C.
Jakimovski, Amnon, Livne, A.
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Approximating by Szsz-Type Operators

2019
Erbay, Hasan/0000-0002-7555 ...
Aral, Ali, Erbay, Hasan
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Time operators, innovations and approximations

Chaos, Solitons & Fractals, 2003
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Suchanecki, Zdzisław, Antoniou, Ioannis
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Neighborhood operator systems and approximations

Information Sciences, 2002
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Wei-Zhi Wu 0001, Wen-Xiu Zhang
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On Rational Approximations of Groups of Operators

SIAM Journal on Numerical Analysis, 1980
In an earlier paper (P. Brenner and V. Thomée, On rational approximations of semi-groups, SIAM J. Numer. Anal., 16 (1979) pp. 683–694) we discussed stability and convergence of rational approximations $r^n (hA)\,nh = t$, of a strongly continuous semigroup $e^{tA} $ on a Banach space X, when $|r(z) \leqq 1|$ for $\operatorname{Re} z \leqq 0$.
Brenner, Philip, Thomee, Vidar
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Rough Approximation Operators in Covering Approximation Spaces

2006
In this paper, we focus on the study of covering based rough sets in covering approximation spaces. Firstly, two pairs of covering approximation operators are reviewed, their properties are investigated. Secondly, Based on the covering of the covering approximation space, two new coverings of the universe are induced, by which two new pairs of covering
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Multifunctions as Approximation Operations in Generalized Approximation Spaces

1998
An approximation space can be defined as a quintuple A = (T, U, F, Φ, Γ), where F : T → U is a multifunction and Φ and Γ are unary operations on the power set of U.
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Approximation by Durrmeyer–Bezier operators

Nonlinear Analysis: Real World Applications, 2008
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Gupta, Vijay, Mohapatra, R. N.
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