For over 150 years, a rule of thumb dating back to the French mathematician Pierre Ossian Bonnet has been accepted in surface theory: If the metric and mean curvature of a compact surface are known at ...
Researchers in the US and Germany have solved a mathematical problem that has puzzled ...
Is there any possibility of having other shapes without being caught by the common sense that "the shape of the celestial body is round"? It seems that the proposition that was considered by ...