Symmetric instantons and Skyrme fields

By explicit construction of the ADHM data, we prove the existence of a char ge-seven instanton with icosahedral symmetry. By computing the holonomy of this instanton we obtain a Skyrme field which approximates the minimal ener gy charge-seven skyrmion. We also present a one-parameter family of tetrahe drally symmetric instantons whose holonomy gives a family of Skyrme fields which models a skyrmion scattering process, where seven well-separated skyr mions collide ta form the icosahedrally symmetric skyrmion.