## Contents of Volume 327, Number 1

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- The Schwartz space of a general semisimple Lie group. II. Wave packets associated to Schwartz functions
- Rebecca A. Herb PDF
- Trans. Amer. Math. Soc.
**327**(1991), 1-69

- The construction of analytic diffeomorphisms for exact robot navigation on star worlds
- Elon Rimon and Daniel E. Koditschek PDF
- Trans. Amer. Math. Soc.
**327**(1991), 71-116

- Linear series with an $N$-fold point on a general curve
- David Schubert PDF
- Trans. Amer. Math. Soc.
**327**(1991), 117-124

- Weighted Sobolev-Poincaré inequalities and pointwise estimates for a class of degenerate elliptic equations
- Bruno Franchi PDF
- Trans. Amer. Math. Soc.
**327**(1991), 125-158

- A dense set of operators with tiny commutants
- Domingo A. Herrero PDF
- Trans. Amer. Math. Soc.
**327**(1991), 159-183

- Automorphisms and twisted forms of generalized Witt Lie algebras
- William C. Waterhouse PDF
- Trans. Amer. Math. Soc.
**327**(1991), 185-200

- Alexander duality and Hurewicz fibrations
- Steven C. Ferry PDF
- Trans. Amer. Math. Soc.
**327**(1991), 201-219

- On the relative reflexivity of finitely generated modules of operators
- Bojan Magajna PDF
- Trans. Amer. Math. Soc.
**327**(1991), 221-249

- $q$-tensor space and $q$-Weyl modules
- Richard Dipper and Gordon James PDF
- Trans. Amer. Math. Soc.
**327**(1991), 251-282

- A modified Schur algorithm and an extended Hamburger moment problem
- Olav Njåstad PDF
- Trans. Amer. Math. Soc.
**327**(1991), 283-311

- Almost tangent and cotangent structures in the large
- G. Thompson and U. Schwardmann PDF
- Trans. Amer. Math. Soc.
**327**(1991), 313-328

- Solving ordinary differential equations in terms of series with real exponents
- D. Yu. Grigor′ev and M. F. Singer PDF
- Trans. Amer. Math. Soc.
**327**(1991), 329-351

- First steps in descriptive theory of locales
- John Isbell PDF
- Trans. Amer. Math. Soc.
**327**(1991), 353-371

- Coefficient ideals
- Kishor Shah PDF
- Trans. Amer. Math. Soc.
**327**(1991), 373-384

- On complete congruence lattices of complete lattices
- G. Grätzer and H. Lakser PDF
- Trans. Amer. Math. Soc.
**327**(1991), 385-405

- Definable singularity
- William J. Mitchell PDF
- Trans. Amer. Math. Soc.
**327**(1991), 407-426

- Control of degenerate diffusions in $\textbf {R}^ d$
- Omar Hijab PDF
- Trans. Amer. Math. Soc.
**327**(1991), 427-448

- Flowbox manifolds
- J. M. Aarts and L. G. Oversteegen PDF
- Trans. Amer. Math. Soc.
**327**(1991), 449-463