#### Volume 7, issue 1 (2003)

 1 M F Atiyah, Elliptic operators, discrete groups and von Neumann algebras, from: "Colloque “Analyse et Topologie” en l'Honneur de Henri Cartan (Orsay, 1974)", Soc. Math. France (1976) MR0420729 2 M F Atiyah, V K Patodi, I M Singer, Spectral asymmetry and Riemannian geometry I, Math. Proc. Cambridge Philos. Soc. 77 (1975) 43 MR0397797 3 M F Atiyah, V K Patodi, I M Singer, Spectral asymmetry and Riemannian geometry II, Math. Proc. Cambridge Philos. Soc. 78 (1975) 405 MR0397798 4 M F Atiyah, V K Patodi, I M Singer, Spectral asymmetry and Riemannian geometry III, Math. Proc. Cambridge Philos. Soc. 79 (1976) 71 MR0397799 5 G Baumslag, E Dyer, A Heller, The topology of discrete groups, J. Pure Appl. Algebra 16 (1980) 1 MR549702 6 W Browder, G R Livesay, Fixed point free involutions on homotopy spheres, Tôhoku Math. J. $(2)$ 25 (1973) 69 MR0321077 7 J Cheeger, M Gromov, On the characteristic numbers of complete manifolds of bounded curvature and finite volume, from: "Differential geometry and complex analysis", Springer (1985) 115 MR780040 8 J Cheeger, M Gromov, Bounds on the von Neumann dimension of $L^2$–cohomology and the Gauss–Bonnet theorem for open manifolds, J. Differential Geom. 21 (1985) 1 MR806699 9 P E Conner, E E Floyd, Differentiable periodic maps, Ergebnisse der Mathematik und ihrer Grenzgebiete, N. F., Band 33, Academic Press (1964) MR0176478 10 F T Farrell, L E Jones, Rigidity for aspherical manifolds with $\pi_1{\subset}\mathrm{GL}_m(\mathbb{R})$, Asian J. Math. 2 (1998) 215 MR1639544 11 J C Hausmann, On the homotopy of nonnilpotent spaces, Math. Z. 178 (1981) 115 MR627098 12 N Higson, G Kasparov, Operator $K$–theory for groups which act properly and isometrically on Hilbert space, Electron. Res. Announc. Amer. Math. Soc. 3 (1997) 131 MR1487204 13 F Hirzebruch, Involutionen auf Mannigfaltigkeiten, from: "Proc. Conf. on Transformation Groups (New Orleans, La., 1967)", Springer (1968) 148 MR0250339 14 N Keswani, Homotopy invariance of relative eta-invariants and $C^*$–algebra $K$–theory, Electron. Res. Announc. Amer. Math. Soc. 4 (1998) 18 MR1613055 15 S López de Medrano, Involutions on manifolds, Ergebnisse der Mathematik und ihrer Grenzgebiete 59, Springer (1971) MR0298698 16 W Lück, $L^2$–invariants of regular coverings of compact manifolds and CW–complexes, from: "Handbook of geometric topology", North-Holland (2002) 735 MR1886681 17 W Lück, $L^2$–invariants: theory and applications to geometry and $K$–theory, Ergebnisse der Mathematik und ihrer Grenzgebiete 44, Springer (2002) MR1926649 18 W Lück, T Schick, Various $L^2$–signatures and a topological $L^2$–signature theorem, from: "High-dimensional manifold topology", World Sci. Publ., River Edge, NJ (2003) 362 MR2048728 19 W Lück, T Schick, Approximating $L^2$–signatures by their compact analogues, Forum Math. 17 (2005) 31 MR2110537 20 V Mathai, Spectral flow, eta invariants, and von Neumann algebras, J. Funct. Anal. 109 (1992) 442 MR1186326 21 M Ramachandran, von Neumann index theorems for manifolds with boundary, J. Differential Geom. 38 (1993) 315 MR1237487 22 A Ranicki, Localization in quadratic $L$–theory, from: "Algebraic topology, Waterloo, 1978 (Proc. Conf., Univ. Waterloo, Waterloo, Ont., 1978)", Lecture Notes in Math. 741, Springer (1979) 102 MR557165 23 B Vaillant, Indextheorie für Überlangerungen, Diplomarbeit, Universität Bonn (1997) 24 C T C Wall, Surgery on compact manifolds, London Mathematical Society Monographs 1, Academic Press (1970) MR0431216 25 S Weinberger, Homotopy invariance of $\eta$–invariants, Proc. Nat. Acad. Sci. U.S.A. 85 (1988) 5362 MR952817