EN
CONTENTS
Introduction..........................................................................................................................................................................5
§1. Categories with involution, ordered categories and ordered categories with involution.................................................8
§2. Types of morphisms regularity in an OI-category. Functional and difunctional morphisms...........................................17
§3. Equivalences and coequivalences. Congruences and cocongruences........................................................................25
§4. Modular categories and correspondence categories...................................................................................................31
§5. A construction of correspondence categories. Admissible and exact functors.............................................................40
§6. Correspondences over sites........................................................................................................................................52
§7. Modular categories with images...................................................................................................................................58
§8. Correspondence categories over categories of classes R₁-R₃....................................................................................62
§9. Correspondence categories over exact categories......................................................................................................69
§10. OI-categories with a quasinull object..........................................................................................................................75
§11. Correspondence categories over exact categories with a null object, over additive and abelian categories..............83
§12. Quaternar categories.................................................................................................................................................88
§13. Construction of quaternar categories.........................................................................................................................93
§14. Supplementary notes and questions........................................................................................................................105
References.......................................................................................................................................................................110