Can someone answer this doubt I have on Set theory?

In summary, the real numbers satisfy eleven properties and are often referred to as forming a field, which is a specific mathematical structure that allows for the usual operations of addition, subtraction, multiplication, and division to be performed in various ways on its elements. This term is used in a technical sense and should not be confused with the common language meaning of the word "field" as an area of study.
  • #1
Rishabh Narula
61
5
"The fact that the above eleven properties are
satisfied is often expressed by
saying that the real numbers form a
field with respect to the usual addition and
multiplication operations."

-what do these lines mean?
in particular the line "form a field with
respect to"?
is it something like real numbers make up
a particular field or category of subject
in which you can perform addition,subtraction,
division and multiplication
in different ways(assosicative,commutative,distributive etc.)
on the various elements?
 
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  • #3
Rishabh Narula said:
is it something like real numbers make up
a particular field or category of subject
in which you can perform addition,subtraction,
division and multiplication
in different ways(assosicative,commutative,distributive etc.)
on the various elements?

That's the basic idea, but you should understand that the word "field" is being used in a technical sense, not in the generic sense of a "field of study". There are mathematical definitions and terms for a variety of mathematical structures which have associated operations. For example, there are monoids, semigroups, groups, rings, and fields. Although there are common language meanings for words like "group" and "field", the mathematical use of such terms involves technical definitions. As @PeroK points out, the mathematical use of the word "field" has a specific definition. I'm not sure how the use of the word "field" came about in the history of mathematics, but "field" in mathematics is more specific that the common language use of the word to indicate an area of study.

If you glance at the mathematical definitions for "group", "ring", "field" etc., you'll understand that the mathematical definitions for such terms differ from the common language use of them. There is even a highly technical mathematical definition for "category".
 
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1. What is Set Theory?

Set theory is a branch of mathematics that deals with the study of sets, which are collections of objects. It is used to understand the relationships between different sets and how they can be manipulated using mathematical operations.

2. What is the purpose of Set Theory?

The purpose of Set Theory is to provide a foundation for mathematics by defining and studying the properties of sets. It also helps to understand the concepts of infinity, logic, and mathematical proof.

3. What are the basic elements of Set Theory?

The basic elements of Set Theory are sets, elements, and operations. Sets are collections of objects, elements are the individual objects within a set, and operations are mathematical operations used to manipulate sets.

4. How is Set Theory used in other fields of science?

Set Theory is used in other fields of science, such as computer science, physics, and statistics. In computer science, it is used to study algorithms and data structures. In physics, it is used to study the properties of particles and their interactions. In statistics, it is used to analyze data and make predictions.

5. What are some common applications of Set Theory?

Some common applications of Set Theory include database design, computer programming, and probability theory. Set Theory is also used in cryptography, graph theory, and linguistics.

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