I ON THE PRIMITIVE TERM OF LOGISTICf IN this article I propose to establish a theorem belonging to logistic concerning some connexions, not widely known, ...

In this manuscript, published here for the first time, Tarski explores the concept of logical notion. He draws on Klein's Erlanger Programm to locate the logical notions of ordinary geometry as those invariant under all transformations of space. Generalizing, he explicates the concept of logical notion of an arbitrary discipline.

This book is well known for its proof that many mathematical systems - including lattice theory and closure algebras - are undecidable. It consists of three treatises from one of the greatest logicians of all time: "A General Method in Proofs of Undecidability," "Undecidability and Essential Undecidability in Mathematics," and "Undecidability of the Elementary Theory of Groups.".

This classic undergraduate treatment examines the deductive method in its first part and explores applications of logic and methodology in constructing mathematical theories in its second part. Exercises appear throughout.

Now in its fourth edition, this classic work clearly and concisely introduces the subject of logic and its applications. The first part of the book explains the basic concepts and principles which make up the elements of logic. The author demonstrates that these ideas are found in all branches of mathematics, and that logical laws are constantly applied in mathematical reasoning. The second part of the book shows the applications of logic in mathematical theory building with concrete examples that draw (...) upon the concepts and principles presented in the first section. Numerous exercises and an introduction to the theory of real numbers are also presented. Students, teachers and general readers interested in logic and mathematics will find this book to be an invaluable introduction to the subject. (shrink)

We provide for the first time an exact translation into English of the Polish version of Alfred Tarski's classic 1936 paper, whose title we translate as ?On the Concept of Following Logically?. We also provide in footnotes an exact translation of all respects in which the German version, used as the basis of the previously published and rather inexact English translation, differs from the Polish. Although the two versions are basically identical, to an extent that is even uncanny, we note (...) more than 400 differences. Several dozen of these are substantive differences due to revisions by Tarski to the Polish version which he did not incorporate in the German version. With respect to these revisions the Polish version should be regarded as more authoritative than the German. Hence scholars limited to an English translation should use ours. (shrink)

Published with the aid of a grant from the National Endowment for the Humanities. Contains the only complete English-language text of The Concept of Truth in Formalized Languages. Tarski made extensive corrections and revisions of the original translations for this edition, along with new historical remarks. It includes a new preface and a new analytical index for use by philosophers and linguists as well as by historians of mathematics and philosophy.

Published with the aid of a grant from the National Endowment for the Humanities. Contains the only complete English-language text of The Concept of Truth in Formalized Languages. Tarski made extensive corrections and revisions of the original translations for this edition, along with new historical remarks. It includes a new preface and a new analytical index for use by philosophers and linguists as well as by historians of mathematics and philosophy.

This paper is an edited form of a letter written by the two authors (in the name of Tarski) to Wolfram Schwabhäuser around 1978. It contains extended remarks about Tarski's system of foundations for Euclidean geometry, in particular its distinctive features, its historical evolution, the history of specific axioms, the questions of independence of axioms and primitive notions, and versions of the system suitable for the development of 1-dimensional geometry.

Provability, Computability and Reflection.

Der Laie spricht manchmal die Ansicht aus, die Mathematik ware heutzutage schon eine tote Wissenschaft: nachdem sie einen ungemein hohen Grad der Entwicklung erreicht hat, sei sie in ihrer steinernen Vollkommenheit erstarrt. Dies ist ein vollig irriges Bild der Situation: nur wenige Wissenschaftsgebiete befinden sich heute in der Phase einer solch intensiven Entwicklung wie die Mathematik. Diese Entwicklung ist dabei auBerordentlich vie1seitig: die Mathematik erweitert ihre Domane nach allen moglichen Richtungen, sie wachst in die Rohe, in die Weite und in (...) die Tiefe. Sie wachst in die Rohe, da auf dem Boden ihrer alten Theorien, denen eine jahrhundert-, ja sogar jahrtausend­ lange Entwicklung zugrunde liegt, immer wieder neue Prob1eme auftauchen, immer scharfere und vollkommenere Resultate er­ zielt werden; in die Weite, da ihre Methoden andere Wissen­ schaftszweige durchdringen, ihr Untersuchungsbereich immer umfangreichere Gebiete von Erscheinungen umfaBt und immer neue Theorien in den groBen Kreis mathematischer Disziplinen einbezogen werden; und schlieBlich in die Tiefe, da ihre Grund­ lagen immer mehr gefestigt, die bei ihrem Aufbau angewandten Methoden immer vollkommener werden und ihre Prinzipien an Dauerhaftigkeit gewinnen. In dem vorliegenden Buch wiinschte ich dem Leser, der fiir die gegenwartige Mathematik Interesse aufweist, aber ihr fern­ steht, mindestens einen ganz allgemeinen Begriff von dieser dritten Entwicklungslinie der Mathematik, d. i. von ihrer Ent­ wicklung in die Tiefe, zu geben. (shrink)

We provide for the first time an exact translation into English of the Polish version of Alfred Tarski's classic 1936 paper, whose title we translate as ‘On the Concept of Following Logically’. We also provide in footnotes an exact translation of all respects in which the German version, used as the basis of the previously published and rather inexact English translation, differs from the Polish. Although the two versions are basically identical, to an extent that is even uncanny, we note (...) more than 400 differences. Several dozen of these are substantive differences due to revisions by Tarski to the Polish version which he did not incorporate in the German version. With respect to these revisions the Polish version should be regarded as more authoritative than the German. Hence scholars limited to an English translation should use ours. (shrink)