Issue 1/2021
Content (4 Articles)
Formalization of Euler–Lagrange Equation Set Based on Variational Calculus in HOL Light
Yong Guan, Jingzhi Zhang, Guohui Wang, Ximeng Li, Zhiping Shi, Yongdong Li
Formalization of the Poincaré Disc Model of Hyperbolic Geometry
Danijela Simić, Filip Marić, Pierre Boutry