The Ordinal Numbers

Grzegorz Bancerek

Warsaw University, Bialystok

Supported by RPBP.III-24.C1.

Summary.

In the beginning of the article we show some consequences of the regularity axiom. In the second part we introduce the successor of a set and the notions of transitivity and connectedness wrt membership relation. Then we define ordinal numbers as transitive and connected sets, and we prove some theorems of them and of their sets. Lastly we introduce the concept of a transfinite sequence and we show transfinite induction and schemes of defining by transfinite induction.

MML Identifier: ORDINAL1

Contents (PDF format)

Bibliography

[1] Czeslaw Bylinski. Functions and their basic properties. Journal of Formalized Mathematics, 1, 1989.

[2] Andrzej Trybulec. Tarski Grothendieck set theory. Journal of Formalized Mathematics, Axiomatics, 1989.

[3] Edmund Woronowicz. Relations and their basic properties. Journal of Formalized Mathematics, 1, 1989.