Integrable many-body systems of Calogero-Ruijsenaars type

This thesis presents our results on Liouville integrable systems of Calogero-Ruijsenaars type: 1. We prove an explicit formula providing canonical spectral coordinates for the rational Calogero-Moser system. 2. We explore action-angle duality for the trigonometric BC(n) Sutherland system using Hamiltonian reduction. 3. We derive a Poisson-Lie deformation of the trigonometric BC(n) Sutherland system using Hamiltonian reduction. 4. We construct a Lax pair for the hyperbolic BC(n) Ruijsenaars-Schneider-van Diejen system. 5. We present an explicit construction of compactified trigonometric and elliptic Ruijsenaars-Schneider systems