University of Isfahan Mathematics and Society 2345-6493 2 4 2018 02 20 A review of entropy in mathematics: from numerical to operator forms A review of entropy in mathematics: from numerical to operator forms 71 84 22118 10.22108/msci.2017.106502.1249 FA Ali Moressaei University of Zanjan Journal Article 2017 09 17 The term entropy has acquired different meanings in various scientific disciplines, of which we refer to the most fundamental ones in this article. Here, we aim to initially provide a historical review of the concept of entropy from its numerical form to its operator form. Along the way, we will delve into some of the key theorems, inequalities, and properties of entropy. The term entropy has acquired different meanings in various scientific disciplines, of which we refer to the most fundamental ones in this article. Here, we aim to initially provide a historical review of the concept of entropy from its numerical form to its operator form. Along the way, we will delve into some of the key theorems, inequalities, and properties of entropy. https://math-sci.ui.ac.ir/article_22118_cc325e928e0827d35432999f4712e219.pdf