Новая страница: «'''Ball number''' --- шаровое число (графа). By a family of solid balls in <math>R^{3}</math>, we mean a family of balls no two of which penetrate…»
(Новая страница: «'''Ball number''' --- шаровое число (графа). By a family of solid balls in <math>R^{3}</math>, we mean a family of balls no two of which penetrate…»)