## Contents of Volume 175

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- Tensor products of group algebras
- J. E. Kerlin PDF
- Trans. Amer. Math. Soc.
**175**(1973), 1-36

- Distance estimates and pointwise bounded density
- A. M. Davie, T. W. Gamelin and J. Garnett PDF
- Trans. Amer. Math. Soc.
**175**(1973), 37-68

- On arithmetical classifications of inaccessable cardinals and their applications
- Géza Fodor and Attila Máté PDF
- Trans. Amer. Math. Soc.
**175**(1973), 69-99

- Modular permutation representations
- L. L. Scott PDF
- Trans. Amer. Math. Soc.
**175**(1973), 101-121

- The existence of $\textrm {Irr}(X)$
- M. W. Mislove PDF
- Trans. Amer. Math. Soc.
**175**(1973), 123-140

- Infinite matroids
- Samuel S. Wagstaff PDF
- Trans. Amer. Math. Soc.
**175**(1973), 141-153

- The growth of subuniform ultrafilters
- S. Negrepontis PDF
- Trans. Amer. Math. Soc.
**175**(1973), 155-165

- Cylindric algebras and algebras of substitutions
- Charles Pinter PDF
- Trans. Amer. Math. Soc.
**175**(1973), 167-179

- A characterization of $U_{3}(2^{n})$ by its Sylow $2$-subgroup
- Robert L. Griess PDF
- Trans. Amer. Math. Soc.
**175**(1973), 181-186

- Boundedly complete $M$-bases and complemented subspaces in Banach spaces
- William J. Davis and Ivan Singer PDF
- Trans. Amer. Math. Soc.
**175**(1973), 187-194

- Averaging operators in $C(S)$ and lower semicontinuous sections of continuous maps
- Seymour Z. Ditor PDF
- Trans. Amer. Math. Soc.
**175**(1973), 195-208

- Class numbers of totally imaginary quadratic extensions of totally real fields
- Judith S. Sunley PDF
- Trans. Amer. Math. Soc.
**175**(1973), 209-232

- Projective groups of degree less than $4p/3$ where centralizers have normal Sylow $p$-subgroups
- J. H. Lindsey PDF
- Trans. Amer. Math. Soc.
**175**(1973), 233-247

- The structure of $n$-uniform translation Hjelmslev planes
- David A. Drake PDF
- Trans. Amer. Math. Soc.
**175**(1973), 249-282

- Embedding theorems and generalized discrete ordered abelian groups
- Paul Hill and Joe L. Mott PDF
- Trans. Amer. Math. Soc.
**175**(1973), 283-297

- The Brauer group of graded Azumaya algebras
- L. N. Childs, G. Garfinkel and M. Orzech PDF
- Trans. Amer. Math. Soc.
**175**(1973), 299-326

- Steenrod squares in spectral sequences. I
- William M. Singer PDF
- Trans. Amer. Math. Soc.
**175**(1973), 327-336

- Steenrod squares in spectral sequences. II
- William M. Singer PDF
- Trans. Amer. Math. Soc.
**175**(1973), 337-353

- Integral representation of functions and distributions positive definite relative to the orthogonal group
- A. E. Nussbaum PDF
- Trans. Amer. Math. Soc.
**175**(1973), 355-387

- On functions positive definite relative to the orthogonal group and the representation of functions as Hankel-Stieltjes transforms
- A. Edward Nussbaum PDF
- Trans. Amer. Math. Soc.
**175**(1973), 389-408

- Space-time processes, parabolic functions and one-dimensional diffusions
- Tze Leung Lai PDF
- Trans. Amer. Math. Soc.
**175**(1973), 409-438

- A generalized operational calculus developed from Fredholm operator theory
- Jack Shapiro and Martin Schechter PDF
- Trans. Amer. Math. Soc.
**175**(1973), 439-467

- Projections and approximate identities for ideals in group algebras
- Teng-Sun Liu, Arnoud van Rooij and Ju Kwei Wang PDF
- Trans. Amer. Math. Soc.
**175**(1973), 469-482

- On the regularity of the Riemann function for hyperbolic equations
- William L. Goodhue PDF
- Trans. Amer. Math. Soc.
**175**(1973), 483-490

- An approximation theorem for biholomorphic functions on $D^{n}$
- Joseph A. Cima PDF
- Trans. Amer. Math. Soc.
**175**(1973), 491-497

- Lower semicontinuity of parametric integrals
- Edward Silverman PDF
- Trans. Amer. Math. Soc.
**175**(1973), 499-508