Table of Contents
1. Introduction 1
2. Main Results 6
3. Fundamental Idea 11
4. Finite Sequences of Algebras (1) 15
5. Countable Sequences of Algebras (1) 27
6. Proof of Theorem II 38
7. Improvement of Theorem II (Proof of Theorem II*) 49
8. Proof of Theorems III and IV 63
9. The Inverse Problem 68
10. Finite Sequences of Algebras (2) 72
11. Countable Sequences of Algebras (2) 88
12. Improvement of some Main Results 97
13. Sets not belonging to Semi-lattices of Subsets and not belonging
to Lattices of Subsets 103
14. Unsolved Problems 107
References 111
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