Published Online: Sep 23, 2017
Page range: 141 - 147
Received: Jun 27, 2017
DOI: https://doi.org/10.1515/forma-2017-0013
Keywords
© 2017 Artur Korniłowicz et al., published by De Gruyter Open
This work is licensed under a Creative Commons Attribution Share-Alike 4.0 License.
In the article we formalize in the Mizar system [