Two sided reproductions of portrait of unidentified man and unidentified woman Portraits; Groups

Digital Image

Group portrait of the American Jewish Joint Distribution Committee; Shanghai Portraits; Groups

Photograph contained within portfolio including title page and signatures

Portrait of three unidentified men outdoors (Prof. and Dr.) Portraits Groups Men

Handwritten names (illegible) on verso

Group portrait, 2nd reunion of the World War II 75th Station Hospital; Hotel Governor, Clinton, New York Portraits Groups

Digital Image

Group portrait, welcome home dinner for ex-service personnel; Newark Beth Israel Hospital; Hotel Essex House, Newark, New Jersey Portraits Groups

Digital Image

Group portrait, testimonial dinner for Dr. Paul Klemperer's 10th anniversary at Mt. Sinai Hospital given by his students; Cavanagh's, New York City Portraits Groups

Digital Image

Non-Abelian monopoles break color. II. Field theory and quantum mechanics

Many grand unified theories (GUT's) predict non-Abelian monopoles which are sources of non-Abelian (and Abelian) magnetic flux. In the preceding paper, we discussed in detail the topological obstructions to the global implementation of the action of the "unbroken symmetry group" H on a classical test particle in the field of such a monopole. In this paper, the existence of similar topological obstructions to the definition of H action on the fields in such a monopole sector, as well as on the states of a quantum-mechanical test particle in the presence of such fields, are shown in detail. Some subgroups of H which can be globally realized as groups of automorphisms are identified. We also discuss the application of our analysis to the SU(5) GUT and show in particular that the non-Abelian monopoles of that theory break color and electroweak symmetries.

Musicologist and philosopher Albert Schweitzer at a piano with cellist and conductor Pablo Casals Portraits Groups Men

Verso: Handwritten inscription to Martin U. Heiman in grateful appreciation signed Hans Moldenhauer 1/8/60

The Ginsbergs visit the Mosse Portraits; Groups

Digital Image

Emilie Mosse and Anna Ginsberg walking in a park; Cape Martin Portraits; Groups; Women

Digital Image

Rudolf Simonis and Margarete (Ingbar) Ekenfors; Albert Bonniers Foerlag Archives; Stockholm Portraits Groups

Digital Image

Lieselotte Hochherr with two unidentified children Portraits; Groups; Children

Handwritten information on back of photo(s).

Simon Hochherr and Ella Hochherr with two unidentified women; Kohlhof Portraits; Groups

Handwritten information on back of photo(s).

Ella Hochherr with unidentified woman and child Portraits; Groups

Handwritten information on back of photo(s).