This　paper　studies　the　robust　consensus　problem　for　a　class　of　linear　multi-agent　systems　(MASs)　with　polytopic　uncertainties　and　external　disturbances.　The　uncertainties　appear　in　both　the　dynamics　of　each　agent　and　the　topology　of　the　overall　network.　Based　on　Lyapunov　stability　theory,　the　robust　consensus　problem　is　converted　to　the　robust　H-infinity　stabilization　of　the　error　system.　With　the　aid　of　the　homogeneous　parameter-dependent　(HPD)　Lyapunov　functions　and　sum　of　squares　(SOS)　technique,　the　robust　consensus　problem　is　further　formulated　as　an　SOS　programming.　Sufficient　conditions　to　achieve　robust　consensus　with　disturbance　rejection　capability　are　presented　in　terms　of　SOS　constraints.　As　an　extension,　the　robust　consensus　problem　for　discrete-time　MASs　is　studied　in　a　similar　way.　Numerical　examples　are　provided　to　illustrate　the　effectiveness　of　the　approach.　(C)　2014　Elsevier　B.V.　All　rights　reserved.