Notation related to quotient fields

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Homework Help Overview

The problem involves the polynomial f(x) = x^6 + x^3 + 1 in the ring Z_2[x] and requires showing that it is irreducible. It also introduces the quotient field E = Z_2[x]/(f(x)) and asks about the meaning of E* in this context.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster seeks clarification on the notation E* and its significance, questioning its meaning in relation to dual spaces. Some participants express uncertainty about the image of x in the quotient field and discuss the potential meaning of the star notation in algebra.

Discussion Status

The discussion is ongoing, with participants exploring the meaning of specific notations and seeking further guidance. Some helpful insights have been shared regarding the interpretation of E* as related to sets without zero-dividers, but no consensus has been reached on the overall understanding of the problem.

Contextual Notes

Participants are navigating the definitions and implications of algebraic structures, particularly in the context of quotient fields and irreducibility, while addressing notation that may vary in meaning across different areas of mathematics.

fortissimo
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Homework Statement



Let f(x) = x6 + x3 + 1 in Z_2[x]. Show that f(x) is irreducible. Let E = Z_2[x]/(f(x)),
and let α denote the image of x in the quotient field. Show that E* = <α>.

Homework Equations



I have solved the first part, but what does E* mean? I have seen the asterix in connection with dual spaces before, but I reckon it means something else here.

The Attempt at a Solution

 
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It would be nice if someone could give some directions...
 
Hi fortissimo! :smile:

I do not understand what you mean with the image of x in the quotient field.

But I do know that the star notation in algebra usually means the set without the zero-dividers.
Hope this helps.
 
Thanks!
 

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