XYZ Press introduces
a truly delightful and
highly instructive work:
Problems from the Book
by
Titu Andreescu
and
Gabriel Dospinescu
Click for more information!
Mathematical Reflections
2008, Issue 6
Angle Inequalities in Tetrahedra
Mark Chen
Download:
pdf
On a vector equality
Nguyen Tien Lam
Download:
pdf
Problem Column
Download:
pdf
Solutions:
pdf