Abstract Algebra[zero polynomial of infinite field]

In summary, abstract algebra is a branch of mathematics that focuses on the study of mathematical structures, such as groups, rings, and fields. A zero polynomial is a polynomial with all coefficients equal to zero and is important in abstract algebra as it helps define the properties of fields and serves as a starting point for understanding more complex polynomials. An infinite field is a field that contains an infinite number of elements, and the zero polynomial is the only polynomial of degree less than or equal to 0 in an infinite field. This makes it the additive identity element and a crucial tool in proving theorems and properties in abstract algebra.
  • #1
malcmitch20
5
0
What would be the best way to show that if F is an infinite field and f(x) is a polynomial in F[x] and f(a)=0 for an infinite number of elements a of F, that f(x) must be the zero polynomial? It kind of just makes logical sense to me, so I can't think of a way to actually show this. please help
 
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  • #2
Use that if f(a) = 0, then x-a divides f(x) in F[x] and show ultimately that any non-zero polynomial have a finite number of zeroes.
 
  • #3
thanks
 

FAQ: Abstract Algebra[zero polynomial of infinite field]

What is abstract algebra?

Abstract algebra is a branch of mathematics that studies mathematical structures, such as groups, rings, and fields, and their properties. It is an abstract and theoretical approach to algebra, rather than focusing on specific numbers and operations.

What is a zero polynomial?

A zero polynomial is a polynomial with all coefficients equal to zero. In other words, it is a polynomial of the form 0x^n + 0x^(n-1) + ... + 0x + 0, where n is the degree of the polynomial. It is also known as the "null polynomial" or "identically zero polynomial".

What is an infinite field?

An infinite field is a field that contains an infinite number of elements. This means that the field is not finite and does not have a limited number of elements. Examples of infinite fields include the real numbers, complex numbers, and rational numbers.

What is the relationship between a zero polynomial and an infinite field?

In an infinite field, the zero polynomial is the only polynomial of degree less than or equal to 0. This means that any other polynomial with coefficients in an infinite field cannot have a degree of 0 or lower. Additionally, the zero polynomial is the additive identity element in an infinite field, meaning that when added to any other polynomial, it will result in the same polynomial.

Why is the concept of a zero polynomial important in abstract algebra?

The zero polynomial plays a crucial role in abstract algebra as it helps define the properties of fields and other algebraic structures. It also serves as a starting point for understanding more complex polynomials and their operations. Additionally, the zero polynomial is used to prove important theorems and properties, such as the uniqueness of the zero polynomial in an infinite field.

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