## Contents of Volume 157

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- The approximation of linear operators
- J. W. Brace and P. J. Richetta PDF
- Trans. Amer. Math. Soc.
**157**(1971), 1-21

- Entire functions and Müntz-Szász type approximation
- W. A. J. Luxemburg and J. Korevaar PDF
- Trans. Amer. Math. Soc.
**157**(1971), 23-37

- A variational method for functions of bounded boundary rotation
- H. B. Coonce PDF
- Trans. Amer. Math. Soc.
**157**(1971), 39-51

- Incompressible surfaces in knot spaces
- Herbert C. Lyon PDF
- Trans. Amer. Math. Soc.
**157**(1971), 53-62

- On the complex bordism of Eilenbeg-Mac Lane spaces and connective coverings of $\textrm {BU}$
- Peter S. Landweber PDF
- Trans. Amer. Math. Soc.
**157**(1971), 63-71

- On the solvability of unit groups of group algebras
- J. M. Bateman PDF
- Trans. Amer. Math. Soc.
**157**(1971), 73-86

- On the stability of the cohomology of complex structures
- Tapio Klemola PDF
- Trans. Amer. Math. Soc.
**157**(1971), 87-97

- Deleted products of spaces which are unions of two simplexes
- W. T. Whitley PDF
- Trans. Amer. Math. Soc.
**157**(1971), 99-111

- A two-stage Postnikov system where $E_{2}\not =E_{\infty }$ in the Eilenberg-Moore spectral sequence
- Claude Schochet PDF
- Trans. Amer. Math. Soc.
**157**(1971), 113-118

- A theory of focal points and focal intervals for an elliptic quadratic form on a Hilbert space
- John Gregory PDF
- Trans. Amer. Math. Soc.
**157**(1971), 119-128

- A class of complete orthogonal sequences of step functions
- J. L. Sox and W. J. Harrington PDF
- Trans. Amer. Math. Soc.
**157**(1971), 129-135

- A maximal function characterization of the class $H^{p}$
- D. L. Burkholder, R. F. Gundy and M. L. Silverstein PDF
- Trans. Amer. Math. Soc.
**157**(1971), 137-153

- $p$-solvable linear groups of finite order
- David L. Winter PDF
- Trans. Amer. Math. Soc.
**157**(1971), 155-160

- Locally flat imbeddings of topological manifolds in codimension three.
- Glenn P. Weller PDF
- Trans. Amer. Math. Soc.
**157**(1971), 161-178

- Real vector bundles and spaces with free involutions
- Allan L. Edelson PDF
- Trans. Amer. Math. Soc.
**157**(1971), 179-188

- A correlation between $\textrm {PSU}_{4} (3)$, the Suzuki group, and the Conway group
- J. H. Lindsey PDF
- Trans. Amer. Math. Soc.
**157**(1971), 189-204

- Coreflective subcategories
- Horst Herrlich and George E. Strecker PDF
- Trans. Amer. Math. Soc.
**157**(1971), 205-226

- Multicoherence techniques applied to inverse limits
- Sam B. Nadler PDF
- Trans. Amer. Math. Soc.
**157**(1971), 227-234

- Stochastic equations with discontinuous drift
- Edward D. Conway PDF
- Trans. Amer. Math. Soc.
**157**(1971), 235-245

- A pairing of a class of evolution systems with a class of generators.
- J. V. Herod PDF
- Trans. Amer. Math. Soc.
**157**(1971), 247-260

- Euclidean $(q+r)$-space modulo an $r$-plane of collapsible $p$-complexes
- Leslie C. Glaser PDF
- Trans. Amer. Math. Soc.
**157**(1971), 261-278

- Asymptotic behavior of solutions of hyperbolic inequalities
- Amy C. Murray PDF
- Trans. Amer. Math. Soc.
**157**(1971), 279-296

- Mappings onto the plane
- Dix H. Pettey PDF
- Trans. Amer. Math. Soc.
**157**(1971), 297-309

- $G$-structures on spheres
- Peter Leonard PDF
- Trans. Amer. Math. Soc.
**157**(1971), 311-327

- Integral representations for continuous linear operators in the setting of convex topological vector spaces
- J. R. Edwards and S. G. Wayment PDF
- Trans. Amer. Math. Soc.
**157**(1971), 329-345

- The volume of tubes in complex projective space
- Robert A. Wolf PDF
- Trans. Amer. Math. Soc.
**157**(1971), 347-371

- The convergence with vanishing viscosity of nonstationary Navier-Stokes flow to ideal flow in $R_{3}$
- H. S. G. Swann PDF
- Trans. Amer. Math. Soc.
**157**(1971), 373-397

- Meta-analytic functions
- M. S. Krishna Sastry PDF
- Trans. Amer. Math. Soc.
**157**(1971), 399-415

- On embedding polyhedra and manifolds
- Krešo Horvatić PDF
- Trans. Amer. Math. Soc.
**157**(1971), 417-436

- The embeddability of a semigroup—Conditions common to Mal’cev and Lambek
- George C. Bush PDF
- Trans. Amer. Math. Soc.
**157**(1971), 437-448

- On mean-periodicity. II
- Edwin J. Akutowicz PDF
- Trans. Amer. Math. Soc.
**157**(1971), 449-457

- The logarithmic limit-set of an algebraic variety
- George M. Bergman PDF
- Trans. Amer. Math. Soc.
**157**(1971), 459-469

- Weak topologies on subspaces of $C(S)$
- Joel H. Shapiro PDF
- Trans. Amer. Math. Soc.
**157**(1971), 471-479

- On the existence of strongly series summable Markuschevich bases in Banach spaces
- William B. Johnson PDF
- Trans. Amer. Math. Soc.
**157**(1971), 481-486

- On the existence of trivial intersection subgroups
- Mark P. Hale PDF
- Trans. Amer. Math. Soc.
**157**(1971), 487-493

- A rank theorem for coherent analytic sheaves
- Günther Trautmann PDF
- Trans. Amer. Math. Soc.
**157**(1971), 495-498

- Addenda to “A variational problem related to an optimal filter problem with self-correlated noise”
- Leonard D. Berkovitz and Harry Pollard PDF
- Trans. Amer. Math. Soc.
**157**(1971), 499-504

- Errata to “General product measures”
- E. O. Elliott and A. P. Morse PDF
- Trans. Amer. Math. Soc.
**157**(1971), 505-506

- Errata to “Concerning arcwise connectedness and the existence of simple closed curves in plane continua”
- Charles L. Hagopian PDF
- Trans. Amer. Math. Soc.
**157**(1971), 507-509

- Errata to “Endomorphism rings generated by units”
- Paul Hill PDF
- Trans. Amer. Math. Soc.
**157**(1971), 511