fast saling ships

October 4th, 2016

ship-copy

Problem of Geometry

October 4th, 2016

The plane intersections of an ellipsoid

The shop-windows with boats

September 29th, 2016

shop-window

The girl near the white tower

September 29th, 2016

dsc00490-copy

The autumn leaves

September 29th, 2016

autom

Problem

September 29th, 2016

Let ABCDE be a convex pentagon in the plane and ABC the inscribed triangle with the max.area. How big can be the area of pentagon?

Generalizations.

no title

September 27th, 2016

no-title

The red boat

September 13th, 2016

the-boat

The Market

September 13th, 2016

dsc01002-copy

The inequality (condition) of Hadwiger.

September 13th, 2016

The Hadwiger’s condition determines the possibility to transporter a convex figure F1 in the interior of a convex figure  F0. A new proof.