1. Ensemble expectations for structures on two-dimensional lattices

   • William R. Fuller

   OriginalPaper Pages: 79 - 87

2. An impossible superposition of electromagnetic waves in general relativity

   • L. Karlov

   OriginalPaper Pages: 89 - 96

3. Antiunitary symmetry operators in quantum mechanics

   • José F. Cariñena
   • Mariano Santander

   OriginalPaper Pages: 97 - 103

4. Spinors, algebraic geometry, and the classification of second-order symmetric tensors in general relativity

   • W. J. Cormack
   • G. S. Hall

   OriginalPaper Pages: 105 - 119

5. Trilocal structures. III. Expansion in tree functions

   • Roger E. Clapp
   • Evelyn W. Mack
   • Joseph A. Wolf Jr.

   OriginalPaper Pages: 121 - 146