| INTRODUCTION: NOTE ON TERMINOLOGY AND NOTATIONS |
| CHAPTER I. ANALYTIC GEOMETRY OF CIRCLES |
| § 1. Representation of Circles by Hermitian Matrices |
| a. One circle |
| b. Two circles |
| c. Pencils of circles |
| Examples |
| § 2. The Inversion |
| a. Definition |
| b. Simple properties of the inversion |
| Examples |
| § 3. Stereographic Projection |
| a. Definition |
| b. Simple properties of the stereographic projection |
| c. Stereographic projection and polarity |
| Examples |
| § 4. Pencils and Bundles of Circles |
| a. Pencils of circles |
| b. Bundles of circles |
| Examples |
| § 5. The Cross Ratio |
| a. The simple ratio |
| b. The double ratio or cross ratio |
| c. The cross ratio in circle geometry |
| Examples |
| CHAPTER II. THE MOEBIUS TRANSFORMATION |
| § 6. Definition: Elementary Properties |
| a. Definition and notation |
| b. The group of all Moebius transformations |
| c. Simple types of Moebius transformations |
| d. Mapping properties of the Moebius transformations |
| e. Transformation of a circle |
| f. Involutions |
| Examples |
| § 7. Real One-dimensional Projectivities |
| a. Perpectivities |
| b. Projectivities |
| c. Line-circle perspectivity |
| Examples |
| § 8. Similarity and Classification of Moebius Transformations |
| a. Introduction of a new variable |
| b. Normal forms of Moebius transformations |
| c. "Hyperbolic, elliptic, loxodromic transformations" |
| d. The subgroup of the real Moebius transformations |
| e. The characteristic parallelogram |
| Examples |
| § 9. Classification of Anti-homographies |
| a. Anti-homographies |
| b. Anti-involutions |
| c. Normal forms of non-involutory anti-homographies |
| d. Normal forms of circle matrices and anti-involutions |
| e. Moebius transformations and anti-homographies as products of inversions |
| f. The groups of a pencil |
| Examples |
| § 10. Iteration of a Moebius Transformation |
| a. General remarks on iteration |
| b. Iteration of a Moebius transformation |
| c. Periodic sequences of Moebius transformations |
| d. Moebius transformations with periodic iteration |
| e. Continuous iteration |
| f. Continuous iteration of a Moebius transformation |
| Examples |
| § 11. Geometrical Characterization of the Moebius Transformation |
| a. The fundamental theorem |
| b. Complex projective transforma |
| c. Representation in space |
| Examples |
| CHAPTER III. TWO-DIMENSIONAL NON-EUCLIDEAN GEOMETRIES |
| § 12. Subgroups of Moebius Transformations |
| a. The group U of the unit circle |
| b. The group R of rotational Moebius transformations |
| c. Normal forms of bundles of circles |
| d. The bundle groups |
| e. Transitivity of the bundle groups |
| Examples |
| § 13. The Geometry of a Transformation Group |
| a. Euclidean geometry |
| b. G-geometry |
| c. Distance function |
| d. G-circles |
| Examples |
| § 14. Hyperbolic Geometry |
| a. Hyperbolic straight lines and distance |
| b. The triangle inequality |
| c. Hyperbolic circles and cycles |
| d. Hyperbolic trigonometry |
| e. Applications |
| Examples |
| § 15. Spherical and Elliptic Geometry |
| a. Spherical straight lines and distance |
| b. Additivity and triangle inequality |
| c. Spherical circles |
| d. Elliptic geometry |
| e. Spherical trigonometry |
| Examples |
| APPENDICES |
| 1. Uniqueness of the cross ratio |
| 2. A theorem of H. Haruki |
| 3. Applications of the characteristic parallelogram |
| 4. Complex Numbers in Geometry by I. M. Yaglom |
| BIBLIOGRAPHY |
| SUPPLEMENTARY BIBLIOGRAPHY |
| INDEX |