Theorem. Let F be a field and ƒ € F[x] a polynomial of degree n. Then there is a finite-dimensional extension of F in which f factors into linear factors f(x) = (x – a1) · … · (x – a,n). Proof. Apply the last theorem repeatedly to get getting extensions of extensions and factor out a linear factor each time until the degree is reduced to 1.
Theorem. Let F be a field and ƒ € F[x] a polynomial of degree n. Then there is a finite-dimensional extension of F in which f factors into linear factors f(x) = (x – a1) · … · (x – a,n). Proof. Apply the last theorem repeatedly to get getting extensions of extensions and factor out a linear factor each time until the degree is reduced to 1.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![Theorem. Let F be a field and f e F[x] a polynomial of degree n. Then
there is a finite-dimensional extension of F in which ƒ factors into linear
factors f(x) = (x – a1) ... (x – an).
Proof. Apply the last theorem repeatedly to get getting extensions of
extensions and factor out a linear factor each time until the degree is reduced
to 1.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F28600506-9d81-4847-979b-f5b69fa325ae%2Ffd4bb56c-8d24-4e95-80df-be9852e13592%2Fne8zhgr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Theorem. Let F be a field and f e F[x] a polynomial of degree n. Then
there is a finite-dimensional extension of F in which ƒ factors into linear
factors f(x) = (x – a1) ... (x – an).
Proof. Apply the last theorem repeatedly to get getting extensions of
extensions and factor out a linear factor each time until the degree is reduced
to 1.
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