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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. POMI, 2020 Volume 493, Pages 138–153 (Mi znsl6965)

Properties of the affine Poincaré wavelet transform

E. A. Gorodnitskiy

Saint Petersburg State University

Abstract: The affine Poincaré wavelet transform is the convolution of the analyzed function and the parameter-dependent function called a wavelet. The wavelet is constructed from a function called the mother wavelet by using Lorentz transformations, shift and scaling and depending on the parameters, characterizing these transformations. We provide uniform by parameters estimates for the affine Poincaré wavelet transforms in some classes of analyzed functions and mother wavelets. Among other things, an estimate of the transform for large shifts and an estimate for large rapidities is proved. Both estimates allow one to check vanishment of the transform at small scales.
We provide an asymptotic calculation of the Poincare affine wavelet transform of the model functions.

Key words and phrases: wave equation, integral representation, affine Poincaré group, wavelet analysis.

UDC: 517

Received: 10.11.2020



© Steklov Math. Inst. of RAS, 2024