## Contents of Volume 315, Number 2

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- Degree theory for equivariant maps. I
- J. Ize, I. Massabò and A. Vignoli PDF
- Trans. Amer. Math. Soc.
**315**(1989), 433-510

- Geometric quantization and the universal enveloping algebra of a nilpotent Lie group
- Niels Vigand Pedersen PDF
- Trans. Amer. Math. Soc.
**315**(1989), 511-563

- Area integral estimates for caloric functions
- Russell M. Brown PDF
- Trans. Amer. Math. Soc.
**315**(1989), 565-589

- The universal von Staudt theorems
- Francis Clarke PDF
- Trans. Amer. Math. Soc.
**315**(1989), 591-603

- Value functions on central simple algebras
- Patrick J. Morandi PDF
- Trans. Amer. Math. Soc.
**315**(1989), 605-622

- Integral Dubrovin valuation rings
- Patrick J. Morandi and Adrian R. Wadsworth PDF
- Trans. Amer. Math. Soc.
**315**(1989), 623-640

- A Mandelbrot set whose boundary is piecewise smooth
- M. F. Barnsley and D. P. Hardin PDF
- Trans. Amer. Math. Soc.
**315**(1989), 641-659

- On infinite root systems
- R. V. Moody and A. Pianzola PDF
- Trans. Amer. Math. Soc.
**315**(1989), 661-696

- Pixley-Roy hyperspaces of $\omega$-graphs
- J. D. Mashburn PDF
- Trans. Amer. Math. Soc.
**315**(1989), 697-709

- Isolated singularities of the Schrödinger equation with a good potential
- Juan Luis Vázquez and Cecilia Yarur PDF
- Trans. Amer. Math. Soc.
**315**(1989), 711-720

- Existence, uniqueness, and stability of oscillations in differential equations with asymmetric nonlinearities
- A. C. Lazer and P. J. McKenna PDF
- Trans. Amer. Math. Soc.
**315**(1989), 721-739

- Deviations of trajectory averages and the defect in Pesin’s formula for Anosov diffeomorphisms
- Steven Orey and Stephan Pelikan PDF
- Trans. Amer. Math. Soc.
**315**(1989), 741-753

- Hyperconvexity and nonexpansive multifunctions
- Robert Sine PDF
- Trans. Amer. Math. Soc.
**315**(1989), 755-767

- Relations between $H^ p_ u$ and $L^ p_ u$ in a product space
- Jan-Olov Strömberg and Richard L. Wheeden PDF
- Trans. Amer. Math. Soc.
**315**(1989), 769-797

- Mappings of trees and the fixed point property
- M. M. Marsh PDF
- Trans. Amer. Math. Soc.
**315**(1989), 799-810

- On a maximal function on compact Lie groups
- Michael Cowling and Christopher Meaney PDF
- Trans. Amer. Math. Soc.
**315**(1989), 811-822

- Scattering for the Yang-Mills equations
- John C. Baez PDF
- Trans. Amer. Math. Soc.
**315**(1989), 823-832

- Regularity of the metric entropy for expanding maps
- Marek Rychlik PDF
- Trans. Amer. Math. Soc.
**315**(1989), 833-847

- Infima of convex functions
- Gerald Beer PDF
- Trans. Amer. Math. Soc.
**315**(1989), 849-859