## Contents of Volume 77, Number 4

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- Miscellaneous front pages, Bull. Amer. Math. Soc., Volume 77, Number 4 (1971)
- Bull. Amer. Math. Soc.
**77**(1971)

- Miscellaneous back pages, Bull. Amer. Math. Soc., Volume 77, Number 4 (1971)
- Bull. Amer. Math. Soc.
**77**(1971)

- Some open questions in the theory of singularities
- Oscar Zariski PDF
- Bull. Amer. Math. Soc.
**77**(1971), 481-491

- Some nonlinear stochastic growth models
- Harry Kesten PDF
- Bull. Amer. Math. Soc.
**77**(1971), 492-511

- A remark on classification of Riemann surfaces with respect to $\Delta u = Pu$
- Mitsuru Nakai PDF
- Bull. Amer. Math. Soc.
**77**(1971), 527-530

- Characteristic classes for ${\text {PL}}$ micro bundles
- Akihiro Tsuchiya PDF
- Bull. Amer. Math. Soc.
**77**(1971), 531-534

- The subgroup structure of the Higman-Sims simple group
- Spyros S. Magliveras PDF
- Bull. Amer. Math. Soc.
**77**(1971), 535-539

- A nonstandard representation of measurable spaces and $L_\infty$
- Peter A. Loeb PDF
- Bull. Amer. Math. Soc.
**77**(1971), 540-544

- Some relations between the metric structure and the algebraic structure of the fundamental group in manifolds of nonpositive curvature
- Detlef Gromoll and Joseph A. Wolf PDF
- Bull. Amer. Math. Soc.
**77**(1971), 545-552

- Duality and von Neumann algebras
- Masamichi Takesaki PDF
- Bull. Amer. Math. Soc.
**77**(1971), 553-557

- Jordan triple systems, $R$-spaces, and bounded symmetric domains
- Ottmar Loos PDF
- Bull. Amer. Math. Soc.
**77**(1971), 558-561

- The Plemelj distributional formulas
- Dragiša Mitrović PDF
- Bull. Amer. Math. Soc.
**77**(1971), 562-563

- Infinite resistive networks
- Harley Flanders PDF
- Bull. Amer. Math. Soc.
**77**(1971), 564

- A maximum principle for optimal control problems with neutral functional differential systems
- G. A. Kent PDF
- Bull. Amer. Math. Soc.
**77**(1971), 565-570

- $K$-theory of a space with coefficients in a (discrete) ring
- David L. Rector PDF
- Bull. Amer. Math. Soc.
**77**(1971), 571-575

- Generalized solutions of quasilinear differential inequalities. I. Elliptic operators
- Neil S. Trudinger PDF
- Bull. Amer. Math. Soc.
**77**(1971), 576-579

- Tight equivariant immersions of symmetric spaces
- Edmund Kelly PDF
- Bull. Amer. Math. Soc.
**77**(1971), 580-583

- On the Selberg condition for subgroups of solvable Lie groups
- Richard Tolimieri PDF
- Bull. Amer. Math. Soc.
**77**(1971), 584-586

- Characterizations of bounded mean oscillation
- Charles Fefferman PDF
- Bull. Amer. Math. Soc.
**77**(1971), 587-588

- Examples of compact locally affine spaces
- John Scheuneman PDF
- Bull. Amer. Math. Soc.
**77**(1971), 589-592

- Semiaposyndetic nonseparating plane continua are arcwise connected
- Charles L. Hagopian PDF
- Bull. Amer. Math. Soc.
**77**(1971), 593-595

- $B_{\left ( {{\text {TOP}}_n } \right )^ \sim }$ and the surgery obstruction
- Frank Quinn PDF
- Bull. Amer. Math. Soc.
**77**(1971), 596-600

- Multiplicity formulas for certain semisimple Lie groups
- J. Lepowsky PDF
- Bull. Amer. Math. Soc.
**77**(1971), 601-605

- More distant than the antipodes
- J. J. Schäffer PDF
- Bull. Amer. Math. Soc.
**77**(1971), 606-609

- Substitution minimal flows
- John C. Martin PDF
- Bull. Amer. Math. Soc.
**77**(1971), 610-612

- A nonsmoothable knot
- Richard K. Lashof PDF
- Bull. Amer. Math. Soc.
**77**(1971), 613-614

- Computation of symbols on $C^*$-algebras of singular integral operators
- R. D. Moyer PDF
- Bull. Amer. Math. Soc.
**77**(1971), 615-620

- Perturbations of the unilateral shift
- Sue-Chin Lin PDF
- Bull. Amer. Math. Soc.
**77**(1971), 621-624

- Normal control problems have no minimizing strictly original solutions
- J. Warga PDF
- Bull. Amer. Math. Soc.
**77**(1971), 625-628

- Manifolds of piecewise linear maps and a related normed linear space
- Ross Geoghegan PDF
- Bull. Amer. Math. Soc.
**77**(1971), 629-632

- Correction to: An algebra of generalized functions on an open interval; two-sided operational calculus
- Gregers Krabbe PDF
- Bull. Amer. Math. Soc.
**77**(1971), 633

- Errata, Volume 76
- Bull. Amer. Math. Soc.
**77**(1971), 634

##
Book Reviews

Book reviews do not contain an abstract. You may
download each review in this issue using the links
below.

- Recursiveness, by Samuel Eilenberg and Calvin C. Elgot.
- Reviewer: Michael A. Arbib

- Review information PDF
- Bull. Amer. Math. Soc.
**77**(1971), 512-521

- Piecewise linear topology, by J. F. P. Hudson.
- Reviewer: David A. Stone

- Review information PDF
- Bull. Amer. Math. Soc.
**77**(1971), 521-526