ACTA issues

## Diophantine exponents for systems of linear forms in two variables

Nikolay G. Moshchevitin

Acta Sci. Math. (Szeged) 79:1-2(2013), 347-367
68/2012

 Abstract. We improve on Jarník's inequality between uniform Diophantine exponent $\alpha$ and ordinary Diophantine exponent $\beta$ for a system of $n\ge2$ real linear forms in two integer variables. Jarník (1949, 1954) proved that $\beta\ge \alpha(\alpha -1)$. In the present paper we give a better bound in the case $\alpha >1$. AMS Subject Classification (1991): 11J13 Keyword(s): Diophantine exponents, linear forms, best approximations Received September 11, 2012, and in revised form February 6, 2012. (Registered under 68/2012.)