Contents of Volume 55

All articles in this issue are freely accessible.

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Approximation theories for measure preserving transformations

Paul R. Halmos.
Trans. Amer. Math. Soc. 55 (1944), 1-18
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MathSciNet review: 0009703

Some results in the theory of quasigroups

Richard H. Bruck.
Trans. Amer. Math. Soc. 55 (1944), 19-52
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MathSciNet review: 0009963

Interpolation and approximation by functions analytic and bounded in a given region

E. N. Nilson and J. L. Walsh.
Trans. Amer. Math. Soc. 55 (1944), 53-67
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MathSciNet review: 0009196

Some properties of ideals in rings of power series

Claude Chevalley.
Trans. Amer. Math. Soc. 55 (1944), 68-84
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MathSciNet review: 0010548

Positive temperatures on an infinite rod

D. V. Widder.
Trans. Amer. Math. Soc. 55 (1944), 85-95
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MathSciNet review: 0009795

Quasi-analyticity and analytic continuation—a general principle

S. Mandelbrojt.
Trans. Amer. Math. Soc. 55 (1944), 96-131
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MathSciNet review: 0009635

The identity of weak and strong extensions of differential operators

K. O. Friedrichs.
Trans. Amer. Math. Soc. 55 (1944), 132-151
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MathSciNet review: 0009701

On the extension of linear transformations

Andrew Sobczyk.
Trans. Amer. Math. Soc. 55 (1944), 153-169
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MathSciNet review: 0010264

On certain integrals

A. Zygmund.
Trans. Amer. Math. Soc. 55 (1944), 170-204
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MathSciNet review: 0009966

A theory of covering and differentiation

Anthony P. Morse.
Trans. Amer. Math. Soc. 55 (1944), 205-235
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MathSciNet review: 0009974

The $\phi$ rectifiable subsets of the plane

A. P. Morse and John F. Randolph.
Trans. Amer. Math. Soc. 55 (1944), 236-305
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MathSciNet review: 0009975

Tensor theory of invariants for the projective differential geometry of a curved surface

Thomas C. Doyle.
Trans. Amer. Math. Soc. 55 (1944), 306-348
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MathSciNet review: 0009877

On a problem of Walsh concerning the Hadamard three circles theorem

Maurice H. Heins.
Trans. Amer. Math. Soc. 55 (1944), 349-372
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MathSciNet review: 0010190

Contributions to the analytic theory of $J$-fractions

H. S. Wall and Marion Wetzel.
Trans. Amer. Math. Soc. 55 (1944), 373-392
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MathSciNet review: 0011339

Postulate-sets for Boolean rings

B. A. Bernstein.
Trans. Amer. Math. Soc. 55 (1944), 393-400
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MathSciNet review: 0009944

Quasigroups. II

A. A. Albert.
Trans. Amer. Math. Soc. 55 (1944), 401-419
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MathSciNet review: 0010597

Surface area. I

Herbert Federer.
Trans. Amer. Math. Soc. 55 (1944), 420-437
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MathSciNet review: 0010610

Surface area. II

Herbert Federer.
Trans. Amer. Math. Soc. 55 (1944), 438-456
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MathSciNet review: 0010611

A new criterion for completely monotonic functions

Harry Pollard.
Trans. Amer. Math. Soc. 55 (1944), 457-464
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MathSciNet review: 0010011

Metric foundations of geometry. I

Garrett Birkhoff.
Trans. Amer. Math. Soc. 55 (1944), 465-492
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MathSciNet review: 0010393

Galois connexions

Oystein Ore.
Trans. Amer. Math. Soc. 55 (1944), 493-513
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MathSciNet review: 0010555

Closure operators and Galois theory in lattices

C. J. Everett.
Trans. Amer. Math. Soc. 55 (1944), 514-525
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MathSciNet review: 0010556