%0 Conference Article %T Point calculus. Historical background and basic definitions %A Balyuba, I.G. %A Konopatskiy, E.V. %K Point calculus, historical reference, applied geometry, space simplex, point, parallel projection invariant %J International Conference "Computing for Physics and Technology - CPT2020" %D 2024 %P 6 %I ANO "Scientific and Research Center for Information in Physics and Technique"