This book is about some recent work in a subject usually considered part of "logic" and the" foundations of mathematics", but also having close connec tions with philosophy and computer science. Namely, the creation and study of "formal systems for constructive mathematics". The general organization of the book is described in the" User's Manual" which follows this introduction, and the contents of the book are described in more detail in the introductions to Part One, Part Two, Part Three, and Part Four. This introduction has a different purpose; it is intended to provide the reader with a general view of the subject. This requires, to begin with, an elucidation of both the concepts mentioned in the phrase, "formal systems for constructive mathematics". "Con structive mathematics" refers to mathematics in which, when you prove that l a thing exists (having certain desired properties) you show how to find it. Proof by contradiction is the most common way of proving something exists without showing how to find it - one assumes that nothing exists with the desired properties, and derives a contradiction. It was only in the last two decades of the nineteenth century that mathematicians began to exploit this method of proof in ways that nobody had previously done; that was partly made possible by the creation and development of set theory by Georg Cantor and Richard Dedekind.

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**Book Description **Book Condition: New. Publisher/Verlag: Springer, Berlin | Metamathematical Studies | This book is about some recent work in a subject usually considered part of "logic" and the" foundations of mathematics", but also having close connec tions with philosophy and computer science. Namely, the creation and study of "formal systems for constructive mathematics". The general organization of the book is described in the" User's Manual" which follows this introduction, and the contents of the book are described in more detail in the introductions to Part One, Part Two, Part Three, and Part Four. This introduction has a different purpose; it is intended to provide the reader with a general view of the subject. This requires, to begin with, an elucidation of both the concepts mentioned in the phrase, "formal systems for constructive mathematics". "Con structive mathematics" refers to mathematics in which, when you prove that l a thing exists (having certain desired properties) you show how to find it. Proof by contradiction is the most common way of proving something exists without showing how to find it - one assumes that nothing exists with the desired properties, and derives a contradiction. It was only in the last two decades of the nineteenth century that mathematicians began to exploit this method of proof in ways that nobody had previously done; that was partly made possible by the creation and development of set theory by Georg Cantor and Richard Dedekind. | 'One. Practice and Philosophy of Constructive Mathematics.- I. Examples of Constructive Mathematics.- 1. The Real Numbers.- 2. Constructive Reasoning.- 3. Order in the Reals.- 4. Subfields of R with Decidable Order.- 5. Functions from Reals to Reals.- 6. Theorem of the Maximum.- 7. Intermediate Value Theorem.- 8. Sets and Metric Spaces.- 9. Compactness.- 10. Ordinary Differential Equations.- 11. Potential Theory.- 12. The Wave Equation.- 13. Measure Theory.- 14. Calculus of Variations.- 15. Plateau's Problem.- 16. Rings, Groups, and Fields.- 17. Linear Algebra.- 18. Approximation Theory.- 19. Algebraic Topology.- 20. Standard Representations of Metric Spaces.- 21. Some Assorted Problems.- II. Informal Foundations of Constructive Mathematics.- 1. Numbers.- 2. Operations or Rules.- 3. Sets and Presets.- 4. Constructive Proofs.- 5. Witnesses and Evidence.- 6. Logic.- 7. Functions.- 8. Axioms of Choice.- 9. Ways of Constructing Sets.- 10. Definite Presets.- III. Some Different Philosophies of Constructive Mathematics.- 1. The Russian Constructivists.- 2. Recursive Analysis.- 3. Bishop's Constructivism.- 4. Objective Intuitionism.- 5. Sets in Intuitionism.- 6. Brouwerian Intuitionism.- 7. Martin-Lof s Philosophy.- 8. Church's Thesis.- IV. Recursive Mathematics: Living with Church's Thesis.- 1. Constructive Recursion Theory.- 2. Diagonalization and "Weak Counterexamples".- 3. Continuity of Effective Operations.- 4. Specker Sequences.- 5. Failure of Konig's Lemma: Kleene's Singular Tree.- 6. Singular Coverings.- 7. Non-Uniformly Continuous Functions.- 8. The Infimum of a Positive Function.- 9. Theorem of the Maximum Revisited.- 10. The Topology of the Disk in Recursive Mathematics.- 11. Pointwise Convergence Versus Uniform Convergence.- 12. Connectivity of Intervals.- 13. Another Surprise in Recursive Topology.- 14. A Counterexample in Descriptive Set Theory.- 15. Differential Equations with no Computable Solutions.- V. The Role of Formal Systems in Foundational Studies.- 1. The Axiomatic Method.- 2. Informal Versus Formal Axiomatics.- 3. Adequacy and Fidelity: Criteria for Formalization.- 4. Constructive and Classical Mathematics Compared.- 5. Arithmetic of Finite Types.- 6. Formalizing Constructive Mathematics in HA?.- Two. Formal Systems of the Seventies.- VI. Theories of Rules.- 1. The Logic of Partial Terms.- 2. Combinatory Algebras.- 3. Axiomatizing Recursive Mathematics.- 4. Term Reduction and the Church-Rosser Theorem Ill.- 5. Combinatory Logic and ?-Cal. Bookseller Inventory # K9783642689543

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**Book Description **Springer Nov 2011, 2011. Taschenbuch. Book Condition: Neu. Neuware - This book is about some recent work in a subject usually considered part of 'logic' and the' foundations of mathematics', but also having close connec tions with philosophy and computer science. Namely, the creation and study of 'formal systems for constructive mathematics'. The general organization of the book is described in the' User's Manual' which follows this introduction, and the contents of the book are described in more detail in the introductions to Part One, Part Two, Part Three, and Part Four. This introduction has a different purpose; it is intended to provide the reader with a general view of the subject. This requires, to begin with, an elucidation of both the concepts mentioned in the phrase, 'formal systems for constructive mathematics'. 'Con structive mathematics' refers to mathematics in which, when you prove that l a thing exists (having certain desired properties) you show how to find it. Proof by contradiction is the most common way of proving something exists without showing how to find it - one assumes that nothing exists with the desired properties, and derives a contradiction. It was only in the last two decades of the nineteenth century that mathematicians began to exploit this method of proof in ways that nobody had previously done; that was partly made possible by the creation and development of set theory by Georg Cantor and Richard Dedekind. 496 pp. Englisch. Bookseller Inventory # 9783642689543

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**Book Description **Springer Nov 2011, 2011. Taschenbuch. Book Condition: Neu. Neuware - This book is about some recent work in a subject usually considered part of 'logic' and the' foundations of mathematics', but also having close connec tions with philosophy and computer science. Namely, the creation and study of 'formal systems for constructive mathematics'. The general organization of the book is described in the' User's Manual' which follows this introduction, and the contents of the book are described in more detail in the introductions to Part One, Part Two, Part Three, and Part Four. This introduction has a different purpose; it is intended to provide the reader with a general view of the subject. This requires, to begin with, an elucidation of both the concepts mentioned in the phrase, 'formal systems for constructive mathematics'. 'Con structive mathematics' refers to mathematics in which, when you prove that l a thing exists (having certain desired properties) you show how to find it. Proof by contradiction is the most common way of proving something exists without showing how to find it - one assumes that nothing exists with the desired properties, and derives a contradiction. It was only in the last two decades of the nineteenth century that mathematicians began to exploit this method of proof in ways that nobody had previously done; that was partly made possible by the creation and development of set theory by Georg Cantor and Richard Dedekind. 496 pp. Englisch. Bookseller Inventory # 9783642689543

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