Sampling formulas involving differences in shift-invariant subspaces: a unified approach Articles uri icon

publication date

  • December 2017

start page

  • 667

end page

  • 688


  • 6


  • 39

International Standard Serial Number (ISSN)

  • 0163-0563

Electronic International Standard Serial Number (EISSN)

  • 1532-2467


  • Successive differences on a sequence of data help discover some smoothness features of this data. This was one of the main reasons for rewriting the classical interpolation formula in terms of such data differences. The aim of this paper is to mimic them to a sequence of regular samples of a function in a shift-invariant subspace allowing its stable recovery. A suitable expression for the functions in the shift-invariant subspace by an isomorphism with the L-2(0,1) space is the key to identify the simple pattern followed by the dual Riesz bases involved in the derived formulas. The paper contains examples illustrating different non-exhaustive situations including also the two-dimensional case.


  • averages; dual riesz bases; forward and backward differences; sampling formulas; shift-invariant subspaces