1,256 research outputs found
Approximation of fuzzy numbers by convolution method
In this paper we consider how to use the convolution method to construct
approximations, which consist of fuzzy numbers sequences with good properties,
for a general fuzzy number. It shows that this convolution method can generate
differentiable approximations in finite steps for fuzzy numbers which have
finite non-differentiable points. In the previous work, this convolution method
only can be used to construct differentiable approximations for continuous
fuzzy numbers whose possible non-differentiable points are the two endpoints of
1-cut. The constructing of smoothers is a key step in the construction process
of approximations. It further points out that, if appropriately choose the
smoothers, then one can use the convolution method to provide approximations
which are differentiable, Lipschitz and preserve the core at the same time.Comment: Submitted to Fuzzy Sets and System at Sep 18 201
Convergence of Fuzzy Tori and Quantum Tori for the quantum Gromov-Hausdorff Propinquity: an explicit approach
Quantum tori are limits of finite dimensional C*-algebras for the quantum
Gromov-Hausdorff propinquity, a metric defined by the author as a strengthening
of Rieffel's quantum Gromov-Hausdorff designed to retain the C*-algebraic
structure. In this paper, we propose a proof of the continuity of the family of
quantum and fuzzy tori which relies on explicit representations of the
C*-algebras rather than on more abstract arguments, in a manner which takes
full advantage of the notion of bridge defining the quantum propinquity.Comment: 41 Pages. This paper is the second half of ArXiv:1302.4058v2. The
latter paper has been divided in two halves for publications purposes, with
the first half now the current version of 1302.4058, which has been accepted
in Trans. Amer. Math. Soc. This second half is now a stand-alone paper, with
a brief summary of 1302.4058 and a new introductio
On the interpretation and identification of dynamic Takagi-Sugenofuzzy models
Dynamic Takagi-Sugeno fuzzy models are not always easy to interpret, in particular when they are identified from experimental data. It is shown that there exists a close relationship between dynamic Takagi-Sugeno fuzzy models and dynamic linearization when using affine local model structures, which suggests that a solution to the multiobjective identification problem exists. However, it is also shown that the affine local model structure is a highly sensitive parametrization when applied in transient operating regimes. Due to the multiobjective nature of the identification problem studied here, special considerations must be made during model structure selection, experiment design, and identification in order to meet both objectives. Some guidelines for experiment design are suggested and some robust nonlinear identification algorithms are studied. These include constrained and regularized identification and locally weighted identification. Their usefulness in the present context is illustrated by examples
Noncommutative Solenoids and the Gromov-Hausdorff Propinquity
We prove that noncommutative solenoids are limits, in the sense of the
Gromov-Hausdorff propinquity, of quantum tori. From this observation, we prove
that noncommutative solenoids can be approximated by finite dimensional quantum
compact metric spaces, and that they form a continuous family of quantum
compact metric spaces over the space of multipliers of the solenoid, properly
metrized.Comment: 15 Pages, minor correction
The Quantum Gromov-Hausdorff Propinquity
We introduce the quantum Gromov-Hausdorff propinquity, a new distance between
quantum compact metric spaces, which extends the Gromov-Hausdorff distance to
noncommutative geometry and strengthens Rieffel's quantum Gromov-Hausdorff
distance and Rieffel's proximity by making *-isomorphism a necessary condition
for distance zero, while being well adapted to Leibniz seminorms. This work
offers a natural solution to the long-standing problem of finding a framework
for the development of a theory of Leibniz Lip-norms over C*-algebras.Comment: 49 Pages. This is the first half of 1302.4058v2, which has been
accepted in Trans. Amer. Math. Soc. The second half is now a different paper
entitled "Convergence of Fuzzy Tori and Quantum Tori for the quantum
Gromov-Hausdorff Propinquity: an explicit approach
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