## Contents of Volume 279, Number 1

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- On the deformation of algebra morphisms and diagrams
- M. Gerstenhaber and S. D. Schack PDF
- Trans. Amer. Math. Soc.
**279**(1983), 1-50

- Weighted iterates and variants of the Hardy-Littlewood maximal operator
- M. A. Leckband and C. J. Neugebauer PDF
- Trans. Amer. Math. Soc.
**279**(1983), 51-61

- On the distribution of the principal series in $L^{2}(\Gamma \backslash G)$
- Roberto J. Miatello and Jorge A. Vargas PDF
- Trans. Amer. Math. Soc.
**279**(1983), 63-75

- Handle attaching on generic maps
- Youn W. Lee PDF
- Trans. Amer. Math. Soc.
**279**(1983), 77-94

- Operators of $P$-variation and the evolution representation problem
- M. A. Freedman PDF
- Trans. Amer. Math. Soc.
**279**(1983), 95-112

- Sign-embeddings of $l^{n}_{1}$
- John Elton PDF
- Trans. Amer. Math. Soc.
**279**(1983), 113-124

- Certain reflexive sheaves on $\textbf {P}^{n}_{\textbf {C}}$ and a problem in approximation theory
- Peter F. Stiller PDF
- Trans. Amer. Math. Soc.
**279**(1983), 125-142

- Stability criteria for Volterra equations
- T. A. Burton and W. E. Mahfoud PDF
- Trans. Amer. Math. Soc.
**279**(1983), 143-174

- An extension of the theory of completely decomposable torsion-free abelian groups
- Fred Richman PDF
- Trans. Amer. Math. Soc.
**279**(1983), 175-185

- Spherical harmonics and integral geometry on projective spaces
- Eric L. Grinberg PDF
- Trans. Amer. Math. Soc.
**279**(1983), 187-203

- Chaotic difference equations: generic aspects
- Hans Willi Siegberg PDF
- Trans. Amer. Math. Soc.
**279**(1983), 205-213

- Elementary first integrals of differential equations
- M. J. Prelle and M. F. Singer PDF
- Trans. Amer. Math. Soc.
**279**(1983), 215-229

- Symbolic dynamics in flows on three-manifolds
- John Franks PDF
- Trans. Amer. Math. Soc.
**279**(1983), 231-236

- On compact cohomology theories and Pontrjagin duality
- Keith Johnson PDF
- Trans. Amer. Math. Soc.
**279**(1983), 237-247

- Nakayama algebras and graded trees
- B. Rohnes and S. O. Smalø PDF
- Trans. Amer. Math. Soc.
**279**(1983), 249-256

- Cohomology detects failures of the axiom of choice
- Andreas Blass PDF
- Trans. Amer. Math. Soc.
**279**(1983), 257-269

- Finitely additive $F$-processes
- Thomas E. Armstrong PDF
- Trans. Amer. Math. Soc.
**279**(1983), 271-295

- Graphs with relations, coverings and group-graded algebras
- Edward L. Green PDF
- Trans. Amer. Math. Soc.
**279**(1983), 297-310

- Characterization of recursively enumerable sets with supersets effectively isomorphic to all recursively enumerable sets
- Wolfgang Maass PDF
- Trans. Amer. Math. Soc.
**279**(1983), 311-336

- Groups and simple languages
- Robert H. Haring-Smith PDF
- Trans. Amer. Math. Soc.
**279**(1983), 337-356

- The slice map problem for $\sigma$-weakly closed subspaces of von Neumann algebras
- Jon Kraus PDF
- Trans. Amer. Math. Soc.
**279**(1983), 357-376

- Hamburger-Noether expansions over rings
- Antonio Campillo PDF
- Trans. Amer. Math. Soc.
**279**(1983), 377-388

- Group rings which are Azumaya algebras
- F. R. DeMeyer and G. J. Janusz PDF
- Trans. Amer. Math. Soc.
**279**(1983), 389-395

- Improved Sobolev inequalities
- Robert S. Strichartz PDF
- Trans. Amer. Math. Soc.
**279**(1983), 397-409

- Borel games and the Baire property
- Kenneth Schilling and Robert Vaught PDF
- Trans. Amer. Math. Soc.
**279**(1983), 411-428

- Erratum to: “Homotopy in functor categories”
- Alex Heller PDF
- Trans. Amer. Math. Soc.
**279**(1983), 429