Vladimir D. Chemeris
Publication date: 06.08.2020
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, master of technical sciences , engineer net dannykh , Свердловская обл Ilia A. Chemeris
, student MBOU SOSh 143 , Свердловская обл
«Rectangles in Lobachevskian Geometry Contradict Euclid's 4th Postulate»
This article can be considered the final proof of Euclid’s 5th postulate. Nevertheless, its main purpose is to show that the difference between Lobachevskian and Euclidean geometry is much more significant than is commonly believed to date.