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Irreducible factors of a polynomial

Part of: Algebraic number theory: global fields Topological fields General field theory

Published online by Cambridge University Press:  24 January 2025

Sneha Mavi Open the ORCID record for Sneha Mavi [Opens in a new window]  and
Anuj Bishnoi Open the ORCID record for Anuj Bishnoi [Opens in a new window]
Sneha Mavi
Affiliation:
Department of Mathematics, University of Delhi, Delhi-110007, India
Anuj Bishnoi*
Affiliation:
Department of Mathematics, University of Delhi, Delhi-110007, India
*
*Corresponding author: Anuj Bishnoi, email: abishnoi@maths.du.ac.in
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Abstract

Let (K, v) be a valued field and $\phi\in K[x]$ be any key polynomial for a residue-transcendental extension w of v to K(x). In this article, using the ϕ-Newton polygon of a polynomial $f\in K[x]$ (with respect to w), we give a lower bound for the degree of an irreducible factor of f. This generalizes the result given in Jakhar and Srinivas (On the irreducible factors of a polynomial II, J. Algebra 556 (2020), 649–655).

Keywords

irreducibilitykey polynomialsNewton polygonsvalued fields

MSC classification

Primary: 11R09: Polynomials (irreducibility, etc.)
Secondary: 12E05: Polynomials (irreducibility, etc.) 12J10: Valued fields
Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , First View , pp. 1 - 10
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Copyright
© The Author(s), 2025. Published by Cambridge University Press on Behalf of The Edinburgh Mathematical Society.

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