Rational approximations on toric varieties

Abstract

Using the universal torsor method due to Salberger, we study the approximation of a general fixed point by rational points on split toric varieties. We prove that under certain geometric hypothesis the best approximations (in the sense of McKinnon-Roth's work) can be achieved on rational curves passing through the fixed point of minimal degree, confirming a conjecture of McKinnon. These curves correspond, according to Batyrev's terminology, to the centred primitive collections of the fan.

Minor revision in proof of Thm. 6.1

References in corpus (4)

• Imaginary quadratic points on toric varieties via universal torsors
• Approximation diophantienne et distribution locale sur une surface torique
• Distribution locale des points rationnels de hauteur bornée sur une surface de del Pezzo de degré 6
• Approximation diophantienne et distribution locale sur une surface torique II