On the Beurling algebras<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="$A_{\alpha}^+(\mathbb{D})$" id="E1"><mml:msubsup><mml:mi>A</mml:mi><mml:mi>α</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mrow><mml:mo>(</mml:mo><mml:mi>𝔻</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>derivations and extensions
International journal of mathematics and mathematical sciences