CONTENTS
(A) INTRODUCTION 1
(B) IDEMPOTENTS AND LINEAR MAPS OF (R)n 5
(C) EQUIVALENCE TRANSFORMATIONS AND INVOLUTIONS 7
(D) INVERTIBLE SUBMODULES OF (R)R AND EQUIVALENCE TRANSFORMATIONS . . TO
(E) RANK ONE ENDOMORPHISMS 27
(F) THE LOCAL CASE 34
(G) THE GLOBAL CASE 42
(H) APPLICATIONS 54
REFERENCES 66
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