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Publicado en línea: 20 jul 2019
Páginas: 139 - 152
Aceptado: 27 may 2019
DOI: https://doi.org/10.2478/forma-2019-0015
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© 2019 Sebastian Koch, published by Sciendo
This work is licensed under a Creative Commons Attribution Share-Alike 4.0 License.
In [3] the existence of the Cantor normal form of ordinals was proven in the Mizar system [6]. In this article its uniqueness is proven and then used to formalize the natural sum of ordinals.