The fundamental theorem of algebra

By: Fine, Benjamin
Contributor(s): Rosenberger, Gerhard [Co-author]
Material type: TextTextSeries: Undergraduate texts in mathematicsPublisher: New York Springer 1997Description: xi, 208 p.: ill. Includes bibliographical references and indexISBN: 9780387946573Subject(s): Fundamental theorem of algebra | Mathematics | Topology | Algebra | Global analysis - MathematicsDDC classification: 512.942 Summary: The fundamental theorem of algebra states that any complex polynomial must have a complex root. This book examines three pairs of proofs of the theorem from three different areas of mathematics: abstract algebra, complex analysis and topology. The first proof in each pair is fairly straightforward and depends only on what could be considered elementary mathematics. However, each of these first proofs leads to more general results from which the fundamental theorem can be deduced as a direct consequence. These general results constitute the second proof in each pair. To arrive at each of the proofs, enough of the general theory of each relevant area is developed to understand the proof. In addition to the proofs and techniques themselves, many applications such as the insolvability of the quintic and the transcendence of e and pi are presented. Finally, a series of appendices give six additional proofs including a version of Gauss'original first proof. The book is intended for junior/senior level undergraduate mathematics students or first year graduate students, and would make an ideal "capstone" course in mathematics. it could also be used as an alternative approach to an undergraduate abstract algebra course. Finally, because of the breadth of topics it covers it would also be ideal for a graduate course for mathematics teachers. https://www.springer.com/in/book/9780387946573
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Table of content

1 Introduction and Historical Remarks
2 Complex Numbers
3 Polynomials and Complex Polynomials
4 Complex Analysis and Analytic Functions
5 Complex Integration and Cauchy's Theorem
6 Fields and Field Extensions
7 Galois Theory
8 Topology and Topological Spaces
9 Algebraic Topology and the Final Proof

The fundamental theorem of algebra states that any complex polynomial must have a complex root. This book examines three pairs of proofs of the theorem from three different areas of mathematics: abstract algebra, complex analysis and topology. The first proof in each pair is fairly straightforward and depends only on what could be considered elementary mathematics. However, each of these first proofs leads to more general results from which the fundamental theorem can be deduced as a direct consequence. These general results constitute the second proof in each pair. To arrive at each of the proofs, enough of the general theory of each relevant area is developed to understand the proof. In addition to the proofs and techniques themselves, many applications such as the insolvability of the quintic and the transcendence of e and pi are presented.

Finally, a series of appendices give six additional proofs including a version of Gauss'original first proof.
The book is intended for junior/senior level undergraduate mathematics students or first year graduate students, and would make an ideal "capstone" course in mathematics. it could also be used as an alternative approach to an undergraduate abstract algebra course. Finally, because of the breadth of topics it covers it would also be ideal for a graduate course for mathematics teachers.

https://www.springer.com/in/book/9780387946573

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