## Contents of Volume 350, Number 2

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- Stability of multiple-pulse solutions
- Björn Sandstede PDF
- Trans. Amer. Math. Soc.
**350**(1998), 429-472

- Comparison theorems and orbit counting in hyperbolic geometry
- Mark Pollicott and Richard Sharp PDF
- Trans. Amer. Math. Soc.
**350**(1998), 473-499

- Lévy processes in semisimple Lie groups and stability of stochastic flows
- Ming Liao PDF
- Trans. Amer. Math. Soc.
**350**(1998), 501-522

- Asymptotics for minimal discrete energy on the sphere
- A. B. J. Kuijlaars and E. B. Saff PDF
- Trans. Amer. Math. Soc.
**350**(1998), 523-538

- Extremal vectors and invariant subspaces
- Shamim Ansari and Per Enflo PDF
- Trans. Amer. Math. Soc.
**350**(1998), 539-558

- Relativity of the spectrum and discrete groups on hyperbolic spaces
- N. Mandouvalos PDF
- Trans. Amer. Math. Soc.
**350**(1998), 559-569

- Hyperbolic groups and free constructions
- O. Kharlampovich and A. Myasnikov PDF
- Trans. Amer. Math. Soc.
**350**(1998), 571-613

- The approximate functional formula for the theta function and Diophantine Gauss sums
- E. A. Coutsias and N. D. Kazarinoff PDF
- Trans. Amer. Math. Soc.
**350**(1998), 615-641

- Derivations, isomorphisms, and second cohomology of generalized Witt algebras
- Dragomir Ž. Đ Oković and Kaming Zhao PDF
- Trans. Amer. Math. Soc.
**350**(1998), 643-664

- On Non-hyperbolic Quasi-convex Spaces
- Rafael Oswaldo Ruggiero PDF
- Trans. Amer. Math. Soc.
**350**(1998), 665-687

- Comparing Heegaard splittings -the bounded case
- Hyam Rubinstein and Martin Scharlemann PDF
- Trans. Amer. Math. Soc.
**350**(1998), 689-715

- Iterations of holomorphic Collet-Eckmann maps: conformal and invariant measures. Appendix: On non-renormalizable quadratic polynomials
- Feliks Przytycki PDF
- Trans. Amer. Math. Soc.
**350**(1998), 717-742

- $L^p$ and operator norm estimates for the complex time heat operator on homogeneous trees
- Alberto G. Setti PDF
- Trans. Amer. Math. Soc.
**350**(1998), 743-768

- Contiguous relations, continued fractions and orthogonality
- Dharma P. Gupta and David R. Masson PDF
- Trans. Amer. Math. Soc.
**350**(1998), 769-808

- Recognizing constant curvature discrete groups in dimension 3
- J. W. Cannon and E. L. Swenson PDF
- Trans. Amer. Math. Soc.
**350**(1998), 809-849

- Erratum to “Orthogonal calculus”
- Michael S. Weiss PDF
- Trans. Amer. Math. Soc.
**350**(1998), 851-855