PageHeader : Funkcialaj Ekvacioj, 41 (1998) 483-503 Title : Higher Order Painleve Equations of Type $A_{l}^{(1)}$ AuthorInfo : By AuthorInfo : Masatoshi NOUMI and Yasuhiko YAMADA AuthorInfo : (Kobe University, Japan) AuthorInfo : Absffact. A series of systems of nonlinear equations with affine Weyl group symmetry AuthorInfo : of type $A_{l}^{(1)}$ is studied. This series gives a generalization of Painleve equations $P_{\mathrm{I}\mathrm{V}}$ AuthorInfo : and $P_{\mathrm{V}}$ to higher orders. section : 1. Introduction section : 1. Affine Weyl group symmetry section : 2. Poisson structure section : 3. Canonical coordinates and the Hamiltonian system section : 4. $\tau$ -Functions section : Appendix section : References