====== TTP06-03 Multiloop Calculations: towards R at Order alpha_s^4 ====== We discuss recent developments in multiloop calculations aiming eventually in computing the total cross section for e^+e^- annihilation into hadrons in order alpha_s^4. |**P.A. Baikov, K.G. Chetyrkin and J.H. K\"uhn** | |** Nucl. Phys. Proc. Suppl. 157 21-31 2006 ** | | {{preprints:2006:ttp06-03.pdf|PDF}} {{preprints:2006:ttp06-03.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0602126|arXiv]] | | |