Approximation by DC Functions and Application to Representation of a Normed Semigroup
<jats:p> Let <jats:inline-formula> <jats:alternatives> <jats:tex-math notation="LaTeX">\Omega</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow>...