By Spyros Angelopoulos (auth.), Evripidis Bampis, Klaus Jansen (eds.)
This booklet constitutes the completely refereed put up workshop complaints of the seventh foreign Workshop on Approximation and on-line Algorithms, WAOA 2009, held in Copenhagen, Denmark, in September 2009 as a part of the ALGO 2009 convention occasion. The 22 revised complete papers awarded have been rigorously reviewed and chosen from sixty two submissions. The workshop coated parts corresponding to algorithmic online game idea, approximation periods, coloring and partitioning, aggressive research, computational finance, cuts and connectivity, geometric difficulties, inapproximability effects, mechanism layout, community layout, packing and overlaying, paradigms for layout and research of approximation and on-line algorithms, parameterized complexity, randomization thoughts, real-world purposes, and scheduling difficulties.