"CEA Operators and the Ershov Hierarchy" was published in the journal Russian Mathematics in 2021. The authors of the article are Arslanov, M.M., Batyrshin, I.I., and Yamaleev, M.M. The article focuses on the concept of CEA operators and their relationship to the Ershov hierarchy. CEA operators, also known as continuous elementary equivalence operators, play a crucial role in model theory and mathematical logic. The authors discuss the properties and characteristics of CEA operators and explore their connection to the Ershov hierarchy, which is a classification of mathematical structures based on their logical complexity. The article provides insights into the theory and applications of CEA operators within the context of the Ershov hierarchy.

What are CEA operators?
CEA operators, or continuous elementary equivalence operators, are mathematical operators that play a significant role in model theory and mathematical logic. They are used to compare and analyze the logical properties of mathematical structures.

What is the Ershov hierarchy?
The Ershov hierarchy is a classification system for mathematical structures based on their logical complexity. It ranks structures according to their expressive power and the complexity of the formulas that can be defined within them.

How are CEA operators related to the Ershov hierarchy?
The article explores the relationship between CEA operators and the Ershov hierarchy. It discusses how CEA operators can be used to analyze the logical properties and complexities of structures within the Ershov hierarchy.

What properties and characteristics do CEA operators possess?
The author discuss various properties and characteristics of CEA operators, such as their continuity, the types of formulas they can evaluate, and their impact on the logical properties of structures.

What are the applications of CEA operators and the Ershov hierarchy?
The article highlight the practical applications of CEA operators and the Ershov hierarchy in areas such as model theory, mathematical logic, computer science, or other fields where analyzing and comparing mathematical structures is essential.