What is an Algebra? Formal Requirements Explained

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In summary, an algebra is a vector space over a field with a multiplication operation that is typically associative, making it a ring. However, there are cases where the requirement of associativity is dropped and the term "associative algebra" is used to describe a vector space that is also a ring.
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Son Goku
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A rather simple question. In my degree and in my own personal time I've been reading texts which use various algebras. Clifford, Grassman, Kac-Moody, Greiss, e.t.c.

However I was wondering what is the formal definition of an algebra, i.e. what makes something an algebra.

I know intuitively what the requirements are, but I'd like to hear the formal requirements, so as to understand what must exist in the first place for an algebra to be constructed.
 
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An algebra is a vector space over some field, k, with a multiplication that behaves reasonably. This is sort of wooly, I admit. Normally (i.e. 99.9% of the time) we mean that it is a Ring so the multiplication operation is associative. Some times these days people drop the requirement of associativity and speak of associative algebras to mean a vector space that is simultaneously a ring.
 
  • #3
matt grime said:
An algebra is a vector space over some field, k, with a multiplication that behaves reasonably. This is sort of wooly, I admit. Normally (i.e. 99.9% of the time) we mean that it is a Ring so the multiplication operation is associative. Some times these days people drop the requirement of associativity and speak of associative algebras to mean a vector space that is simultaneously a ring.
Thank you.
That basically answers my question.
 

FAQ: What is an Algebra? Formal Requirements Explained

What is algebra?

Algebra is a branch of mathematics that deals with symbols and the rules for manipulating those symbols to solve equations and express relationships between quantities.

Why is algebra important?

Algebra is an essential tool for solving real-world problems in fields such as science, engineering, economics, and finance. It also helps develop critical thinking and problem-solving skills.

What are the basic concepts of algebra?

The basic concepts of algebra include variables, expressions, equations, and functions. Variables are symbols that represent unknown quantities, while expressions are combinations of variables, numbers, and operations. Equations are mathematical statements that equate two expressions, and functions describe how one quantity depends on another.

How is algebra different from arithmetic?

While arithmetic focuses on manipulating numbers using basic operations like addition, subtraction, multiplication, and division, algebra expands on these operations and includes the use of variables and symbols to represent unknown quantities. Algebra also deals with more complex mathematical concepts, such as equations and functions.

What are the formal requirements for learning algebra?

To learn algebra, one should have a solid understanding of basic arithmetic and mathematical concepts, such as fractions, decimals, and order of operations. It also requires the ability to think abstractly and logically, as well as good problem-solving skills.

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