Astapov Ivan Stepanovich

Publications in Math-Net.Ru

1. The variety of generalizations of the Ptolemy's theorem
   
   Dal'nevost. Mat. Zh., 19:2 (2019),  129–137
2. Comparative analysis of solutions to $3^{rd}$ and $4^{th}$ order algebraic equations
   
   Sib. J. Pure and Appl. Math., 16:1 (2016),  14–28
3. Fracture model for structured quasibrittle materials
   
   Prikl. Mekh. Tekh. Fiz., 55:6 (2014),  173–185
4. Systems of integro-differential equations describing unsteady motion of bodies in a continuum
   
   Differ. Uravn., 18:9 (1982),  1628–1637


5. The modern generalizations of the Ptolemy's theorem
   
   Math. Ed., 2020, no. 2(94),  18–28