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The Birth of Model Theory: Lowenheim's Theorem in the Frame of the Theory of Relatives
     

The Birth of Model Theory: Lowenheim's Theorem in the Frame of the Theory of Relatives

by Calixto Badesa
 

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ISBN-10: 0691058539

ISBN-13: 9780691058535

Pub. Date: 01/05/2004

Publisher: Princeton University Press

Löwenheim's theorem reflects a critical point in the history of mathematical logic, for it marks the birth of model theory—that is, the part of logic that concerns the relationship between formal theories and their models. However, while the original proofs of other, comparably significant theorems are well understood, this is not the case with

Overview

Löwenheim's theorem reflects a critical point in the history of mathematical logic, for it marks the birth of model theory—that is, the part of logic that concerns the relationship between formal theories and their models. However, while the original proofs of other, comparably significant theorems are well understood, this is not the case with Löwenheim's theorem. For example, the very result that scholars attribute to Löwenheim today is not the one that Skolem—a logician raised in the algebraic tradition, like Löwenheim—appears to have attributed to him. In The Birth of Model Theory, Calixto Badesa provides both the first sustained, book-length analysis of Löwenheim's proof and a detailed description of the theoretical framework—and, in particular, of the algebraic tradition—that made the theorem possible.

Badesa's three main conclusions amount to a completely new interpretation of the proof, one that sharply contradicts the core of modern scholarship on the topic. First, Löwenheim did not use an infinitary language to prove his theorem; second, the functional interpretation of Löwenheim's normal form is anachronistic, and inappropriate for reconstructing the proof; and third, Löwenheim did not aim to prove the theorem's weakest version but the stronger version Skolem attributed to him. This book will be of considerable interest to historians of logic, logicians, philosophers of logic, and philosophers of mathematics.

Product Details

ISBN-13:
9780691058535
Publisher:
Princeton University Press
Publication date:
01/05/2004
Pages:
256
Product dimensions:
6.48(w) x 9.50(h) x 0.86(d)

Table of Contents

Preface ix
Chapter 1. Algebra of Classes and Propositional Calculus 1
1.1 Boole 1
1.2 Jevons 10
1.3 Peirce 12
1.4 Schröder 17
Chapter 2. The Theory of Relatives 31
2.1 Introduction 31
2.2 Basic concepts of the theory of relatives 33
2.3 Basic postulates of the theory of relatives 40
2.4 Theory of relatives and model theory 51
2.5 First-order logic of relatives 66
Chapter 3. Changing the Order of Quantifiers 73
3.1 Schröder's proposal 73
3.2 Löwenheim's approach 81
3.3 The problem of expansions 87
3.4 Skolem functions 94
Chapter 4. The Löwenheim Normal Form 107
4.1 The Löwenheim normal form of an equation 107
4.2 Comments on Löwenheim's method 113
4.3 Conclusions 122
Chapter 5. Preliminaries to Löwenheim's Theorem 129
5.1 Indices and elements 129
5.2 Types of indices 132
5.3 Assignments 135
5.4 Types of equations 138
Chapter 6. Löwenheim's Theorem 143
6.1 The problem 143
6.2 An analysis of Löwenheim's proof 148
6.3 Reconstructing the proof 191
Appendix. First-Order Logic with Fleeing Indices 207
A.1 Introduction 207
A.2 Syntax 207
A.3 Semantics 211
A.4 The Löwenheim normal form 217
A.5 Löwenheim's theorem 220
References 227
Index 237

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