Can Discriminants of Polynomial Equations Be Expressed Using Matrix Operations?

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Discussion Overview

The discussion centers on whether the discriminants of polynomial equations, specifically quadratic, cubic, and quartic, can be expressed using matrix operations such as trace and determinant. It explores the relationship between polynomial discriminants and matrix representations.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the possibility of rewriting the discriminants of quadratic, cubic, and quartic equations in terms of matrices and matrix operations.
  • Several participants reference a Wikipedia article that purportedly contains the answer to the question posed.
  • One participant acknowledges the complexity of the formulas presented in the article, indicating initial difficulty in understanding them.
  • Another participant suggests that matrix formulas for the discriminants, with coefficients replaced, do exist online, implying that specific forms can be derived from the general formula provided in the article.
  • There is a suggestion that the Wikipedia article includes specific formulas for the case of quartic discriminants.

Areas of Agreement / Disagreement

Participants generally agree that the Wikipedia article contains relevant information regarding the matrix representation of polynomial discriminants, but there is no consensus on the clarity or accessibility of that information. The discussion remains somewhat unresolved regarding the specific matrix forms and their applications.

Contextual Notes

Some participants express uncertainty about the complexity of the formulas and their applicability, indicating that further exploration may be necessary to fully understand the matrix representations of the discriminants.

Jhenrique
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Is possible to rewrite the quadratic, cubic and quartic determinant in terms of matrices and matrix operations (trace and determinant)?

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https://en.wikipedia.org/wiki/Discriminant_of_a_polynomial#Formulas_for_low_degrees
 
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The answer is in the very wiki article that you cite.
 
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micromass said:
The answer is in the very wiki article that you cite.

It's true, sorry!

The formula is too complex that I didn't recognize at 1st vista.
 
micromass said:
The answer is in the very wiki article that you cite.

But exist in somewhere in the internet the matrix formula (already replaced by coefficients) for the quadratic, cubic and quartic discriminant?
 
Jhenrique said:
But exist in somewhere in the internet the matrix formula (already replaced by coefficients) for the quadratic, cubic and quartic discriminant?

Yes, of course. The wiki link gives the general formula. So just take a specific ##n##.
It also gives the formula for ##n=4##.
 
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