# Highly Nonlinear Approximations for Sparse Signal Representation

# List of Symbols

The following notations and symbols will be used without defining them explicitly:union | |||

intersection | |||

subset of | |||

proper subset of | |||

belong(s) | |||

set of all positive integers | |||

set of all integers | |||

field of all real numbers | |||

field of all complex numbers | |||

field of real or complex numbers | |||

is defined by | |||

imply (implies) | |||

if and only if | |||

maps to |

The Kronecker symbol is given by