• Real Numbers Inequality(01/01/07)

Solution


• A trigonometric equation / A differential inequality (12/18/06)

Solutions


• Logic riddle / Intersection of euclidean balls (12/11/06)

Solutions


• Chebyshev Polynomials / Odd eigenvalues of a matrix (12/04/06)

Solutions


• A graph theory problem / Convergence of a geometric mean (11/27/06)

Solutions


• Covering a unit square / Constant function (11/20/06)

Solutions
No elementary solution yet for the first problem !

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