# Volume 84, No. 2 (2009)

Commentarii Mathematici Helvetici

pp. 223–233 Diameter pinching in almost positive Ricci curvatureErwann Aubry

DOI 10.4171/CMH/160pp. 235–258 Freeness of conic-line arrangements in $P_{2}$Henry K. SchenckŞtefan O. Tohǎneanu

DOI 10.4171/CMH/161pp. 259–296 Groups with finitely many conjugacy classes and their automorphismsAshot Minasyan

DOI 10.4171/CMH/162pp. 297–337 Lower algebraic $K$-theory of hyperbolic 3-simplex reflection groupsJean-François LafontIvonne J. Ortiz

DOI 10.4171/CMH/163pp. 339–349 $NK_{0}$ and $NK_{1}$ of the groups $C_{4}$ and $D_{4}$. Addendum to “Lower algebraic $K$-theory of hyperbolic 3-simplex reflection groups” by J.-F. Lafont and I. J. OrtizCharles A. Weibel

DOI 10.4171/CMH/164pp. 351–386 Complete surfaces with positive extrinsic curvature in product spacesJosé M. EspinarJosé A. GálvezHarold Rosenberg

DOI 10.4171/CMH/165pp. 387–427 Counting tropical elliptic plane curves with fixed $j$-invariantMichael KerberHannah Markwig

DOI 10.4171/CMH/166pp. 429–436 On the Weinstein conjecture in higher dimensionsPeter AlbersHelmut W. Hofer

DOI 10.4171/CMH/167pp. 437–455 Amenable groups and Hadamard spaces with a totally disconnected isometry groupPierre-Emmanuel Caprace

DOI 10.4171/CMH/168