Tabachnikov, Serge.
Geometry and billiards - Providence, R.I. American Mathematical Society 2005. - 176p. cm. - Student Mathematical Library 30 .
0821839195
Geometry
Research.
Calculus of variations
Research.
Billiards
Research.
516 TAB
Geometry and billiards - Providence, R.I. American Mathematical Society 2005. - 176p. cm. - Student Mathematical Library 30 .
0821839195
Geometry
Research.
Calculus of variations
Research.
Billiards
Research.
516 TAB