Foreword to the New Edition by Douglas R. Hofstadter ix
Acknowledgments xxiii
ii The Problem of Consistency 7
iii Absolute Proofs of Consistency 25
iv The Systematic Codification ofFormal Logic 37
v An Example of a Successful Absolute Proof of
vi The Idea ofMapping and Its Use in Mathematics 57
vii GódePs Proofs 68
a Gódel numbering 68
b The aridimetization of meta-mathematics 80
c The heart of GódePs argument 92
viii Concluding Reflections 109
Appendix: Notes 114
Index 127
vii