The number of antichains in ranked posets

Articles in the same Issue

1. On α-closed classes and α-complete Systems of k-valued logic functions
2. Superstructure of the closed class of polynomials modulo k
3. The mimber of functions in some closed classes of partial k-valued logic
4. The number of antichains in ranked posets
5. Distribution of primitive and irreducible polynomials modulo a prime number
6. Sphere-packing in Euclidean space and extremal problems for trigonometrical polynomials
7. Central limit theorem for the sums of random variables any r of which are independent
8. Decomposable statistics in an inverse allocation problem
9. On the branch size of random m-trees
10. Substitutions with cycle lengths from a fixed set