Geodesic

Volume 81 (2017) no. 1

Sommaire

Decease of the Great Russian Mathematician Igor Shafarevich
The XXV-th Interregional Math Olympiad for School Students SAMMAT
p. 3-14
Summation and hyper-summation of progressions
p. 15-26
Fuss formula
p. 27-32
Operators of the type $Af(x)=f(aх+b)-\lambda f(x)$ and functional equations in problems of math competitions
p. 33-39
Resolving of three-edge polygons of types $eee(i)$ and $eee(iii)$ on hyperbolic plane of positive curvature
p. 40-47
Geometric ideas of N.~Lobachevsky (for his 225-th anniversary)
p. 48-51
Mathematics in the context of world culture
p. 52-62
Outstanding historian of education Rebekka Zalmanovna Gushel
p. 63-64