Marjan Adib2026-03-222026-03-222019http://jnrm.srbiau.ac.ir/article_14054_2f1dbe90803e1b747cc0bd57ce05493c.pdfhttps://andeanlibrary.org/handle/123456789/67626In this paper we shall study the multipliers on Banach algebras and We prove some results concerning Arens regularity and amenability of the Banach algebra M(A) of all multipliers on a given Banach algebra A. We also show that, under special hypotheses, each Jordan multiplier on a Banach algebra without order is a multiplier. Finally, we present some applications of multipliers in signal theory, and in particular in earthquake engineering.enMultiplier (economics)Banach algebraAlgebra over a fieldMathematicsPure mathematicsBanach spacearticle