%0 Journal Article %T Instantons on noncommutative R^4, and (2,0) superconformal six dimensional theory %A N. Nekrasov %A A. Schwarz %J Mathematics %D 1998 %I arXiv %R 10.1007/s002200050490 %X We show that the resolution of moduli space of ideal instantons parameterizes the instantons on non-commutative $\IR^{4}$. This moduli space appears as a Higgs branch of the theory of $k$ $D0$-branes bound to $N$ $D4$-branes by the expectation value of the $B$ field. It also appears as a regularized version of the target space of supersymmetric quantum mechanics arising in the light cone description of $(2,0)$ superconformal theories in six dimensions. %U http://arxiv.org/abs/hep-th/9802068v3