Visual-geometric Representation of Theorem Proofs in Nomotex DLS Yury I. Dimitrienko, Kirill M. Zubarev, Elena A. Gubareva, Tatyana L. Ivanova, Raisa K. Alesina and Alexander V. Alesin ITM Web Conf., 35 (2020) 03009 Published online: 09 December 2020 DOI: 10.1051/itmconf/20203503009