On function spaces with fractional Fourier transform in weighted Lebesgue spaces

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Toksoy E., Sandıkçı A.

JOURNAL OF INEQUALITIES AND APPLICATIONS, cilt.2015, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2015
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1186/s13660-015-0609-4
  • Dergi Adı: JOURNAL OF INEQUALITIES AND APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: fractional Fourier transform, convolution, Banach module, CONVOLUTION, PRODUCT
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

Let w and co be weight functions on R-d. In this work, we define A(alpha,p)(w,omega)(R-d) to be the vector space of f is an element of L-w(1) (R-d) such that the fractional Fourier transform F(alpha)f belongs to L-omega(p)(R-d) for 1 <= p < infinity. We endow this space with the sum norm parallel to f parallel to A(alpha,p)(w,omega) = parallel to f parallel to(1,w) + parallel to F(alpha)f parallel to(pw) and show that A(alpha,p)(w,omega)(R-d) becomes a Banach space and invariant under time-frequency shifts. Further we show that the mapping y -> T(y)f is continuous from R-d into A(alpha,p)(w,omega)(R-d) the mapping z -> M(z)f is continuous from R-d into A(alpha,p)(w,omega)(R-d) and A(alpha,p)(w,omega)(R-d) is a Banach module over L-w(1)(R-d) with Theta convolution operation. At the end of this work, we discuss inclusion properties of these spaces.