Embeddings between Lorentz sequence spaces are strictly but not finitely strictly singular

Abstrakt

Given 0 p pound,r between Lorentz sequence spaces. We introduce a new method of proving that this non-compact embedding is always strictly singular but not finitely strictly singular.

Klíčová slova

• Key words and phrases
• Sobolev embedding
• spaces with variable exponent
• approximation theory
• s-numbers