## Contents of Volume 240

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- Hypoellipticity on the Heisenberg group-representation-theoretic criteria
- Charles Rockland PDF
- Trans. Amer. Math. Soc.
**240**(1978), 1-52

- The conjugacy problem for boundary loops in $3$-manifolds
- Benny D. Evans PDF
- Trans. Amer. Math. Soc.
**240**(1978), 53-64

- Erickson’s conjecture on the rate of escape of $d$-dimensional random walk
- Harry Kesten PDF
- Trans. Amer. Math. Soc.
**240**(1978), 65-113

- The cohomology of semisimple Lie algebras with coefficients in a Verma module
- Floyd L. Williams PDF
- Trans. Amer. Math. Soc.
**240**(1978), 115-127

- Existence, stability, and compactness in the $\alpha$-norm for partial functional differential equations
- C. C. Travis and G. F. Webb PDF
- Trans. Amer. Math. Soc.
**240**(1978), 129-143

- Some exponential moments of sums of independent random variables
- J. Kuelbs PDF
- Trans. Amer. Math. Soc.
**240**(1978), 145-162

- Variations, characteristic classes, and the obstruction to mapping smooth to continuous cohomology
- Mark A. Mostow PDF
- Trans. Amer. Math. Soc.
**240**(1978), 163-182

- Operators with small self-commutators
- J. W. Del Valle PDF
- Trans. Amer. Math. Soc.
**240**(1978), 183-194

- On the growth of solutions of algebraic differential equations
- Steven B. Bank PDF
- Trans. Amer. Math. Soc.
**240**(1978), 195-212

- Classifying open principal fibrations
- David A. Edwards and Harold M. Hastings PDF
- Trans. Amer. Math. Soc.
**240**(1978), 213-220

- Continuous maps of the interval with finite nonwandering set
- Louis Block PDF
- Trans. Amer. Math. Soc.
**240**(1978), 221-230

- Ultrapowers and local properties of Banach spaces
- Jacques Stern PDF
- Trans. Amer. Math. Soc.
**240**(1978), 231-252

- The signature of symplectic manifolds
- Leslie P. Jones PDF
- Trans. Amer. Math. Soc.
**240**(1978), 253-262

- Conditionally compact semitopological one-parameter inverse semigroups of partial isometries
- M. O. Bertman PDF
- Trans. Amer. Math. Soc.
**240**(1978), 263-275

- $(E^{3}/X)\times E^{1}\approx E^{4}$ ($X$, a cell-like set): an alternative proof
- J. W. Cannon PDF
- Trans. Amer. Math. Soc.
**240**(1978), 277-285

- On the Seifert manifold of a $2$-knot
- M. A. Gutierrez PDF
- Trans. Amer. Math. Soc.
**240**(1978), 287-294

- Strong differentiability of Lipschitz functions
- C. J. Neugebauer PDF
- Trans. Amer. Math. Soc.
**240**(1978), 295-306

- Paracompactness of box products of compact spaces
- Kenneth Kunen PDF
- Trans. Amer. Math. Soc.
**240**(1978), 307-316

- Projective modules over subrings of $k[X, Y]$
- David F. Anderson PDF
- Trans. Amer. Math. Soc.
**240**(1978), 317-328

- Projective varieties of low codimension in characteristic $p>0$
- Robert Speiser PDF
- Trans. Amer. Math. Soc.
**240**(1978), 329-343

- Reductions of residuals are finite
- R. Hindley PDF
- Trans. Amer. Math. Soc.
**240**(1978), 345-361

- Infinitesimal calculus on locally convex spaces. I. Fundamentals
- K. D. Stroyan PDF
- Trans. Amer. Math. Soc.
**240**(1978), 363-383

- Sets of divergence on the group $2^{\omega }$
- David C. Harris and William R. Wade PDF
- Trans. Amer. Math. Soc.
**240**(1978), 385-392

- Erratum: “A partial surface variation for extremal schlicht functions” (Trans. Amer. Math. Soc.
**234**(1977), no. 1, 119–138) - T. L. McCoy PDF
- Trans. Amer. Math. Soc.
**240**(1978), 393