Results 171 to 180 of about 618,275 (223)

Parametric action of homomorphic image of modular group and it's application in image encryption. [PDF]

open access: yesSci Rep
Rafiq A   +7 more
europepmc   +1 more source

Approximately Axisymmetric Antidynamo Theorems

SIAM Journal on Applied Mathematics, 2018
The validity of the well-known Cowling's theorem, that an axially symmetric MHD dynamo cannot exist in an electrically conducting fluid, is studied by the author for small scale deviations from strict axial symmetry. It is shown that the theorem can be extended as to include weakly non-axisymmetric configurations under the derived new symmetry ...
openaire   +1 more source

Approximating classical theorems

Journal of Logic and Computation, 1998
Approximation of classical theorems by constructive ones is considered. (By constructive proofs the authors understand those proofs that do not use the Excluded Middle principle.) The paper develops some ideas of G. Kreisel, P. S. Novikov and T. Coquand.
Baratella, Stefano, S. Berardi
openaire   +3 more sources

EMBEDDING THEOREMS AND BEST APPROXIMATIONS

Mathematics of the USSR-Sbornik, 1975
We establish necessary and sufficient conditions, in terms of best approximations, for a function in () to belong to (p$ SRC=http://ej.iop.org/images/0025-5734/26/2/A04/tex_sm_2477_img4.gif/>). The proofs depend on the properties of equimeasurable functions, which were applied by Ul'janov in the theory of the embedding of certain classes for (MR 37
openaire   +2 more sources

Approximation Theorems of Analysis

1999
This is an expository article about Dirac families. Applications include the theorem of Weierstrass on polynomial approximations of continuous functions, the result of Fejér-Cesàro on Fourier series, harmonic functions and Poisson families, and finally, solutions of the heat equation.
openaire   +2 more sources

Home - About - Disclaimer - Privacy