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Mathematics

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  Determination of Some Properly Irregular Cyclotomic Fields

  Elizabeth T. Stafford and H. S. Vandiver

  PNAS February 1, 1930 16 (2) 139-150; https://doi.org/10.1073/pnas.16.2.139
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  On an Extension of the Fourier Theorem Giving Rapid Methods for Calculating the Constant Part and the Coefficient of Any Periodic Term in the Disturbing Function

  Ernest W. Brown

  PNAS February 1, 1930 16 (2) 150-156; https://doi.org/10.1073/pnas.16.2.150
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  Content-Preserving Transformations

  M. S. Knebelman

  PNAS February 1, 1930 16 (2) 156-159; https://doi.org/10.1073/pnas.16.2.156
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  Simplicity with Respect to Certain Quadratic Forms

  E. T. Bell

  PNAS February 1, 1930 16 (2) 160-162; https://doi.org/10.1073/pnas.16.2.160
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  The Differential Geometry of a Continuous Infinitude of Contravariant functional Vectors

  Aristotle D. Michal

  PNAS February 1, 1930 16 (2) 162-164; https://doi.org/10.1073/pnas.16.2.162
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  Projective Functional Tensors and Other Allied Functionals

  Aristotle D. Michal

  PNAS February 1, 1930 16 (2) 165-168; https://doi.org/10.1073/pnas.16.2.165
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  Non-Abelian Groups Admitting More Than Half Inverse Correspondencies

  G. A. Miller

  PNAS February 1, 1930 16 (2) 168-172; https://doi.org/10.1073/pnas.16.2.168
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  Linear Transformations in Hilbert Space

  M. H. Stone

  PNAS February 1, 1930 16 (2) 172-175; https://doi.org/10.1073/pnas.16.2.172