We generalize Dirichlet's diophantine approximation theorem to approximating
any real number $\alpha$ by a sum of two rational numbers $\frac{a_1}{q_1} +
\frac{a_2}{q_2}$ with denominators $1 \leq q_1, q_2 \leq N$. This turns out to
be related to the congruence equation problem $x y \equiv c \pmod q$ with $1
\leq x, y \leq q^{1/2 + \epsilon}$.Comment: 13 pages, improved results and some changes in the proof

Chan, Tsz Ho