Sarah Ella Giefer talks about a book belonging to her family,a personal encyclopedia of Giefers. The book is called "The Giefer Family in Germany and the United States". It has 2 volumes, 700 pages, and has information in it on hundreds of Giefers.
Giefer, Sarah Ella
University of Minnesota, Immigration History Research Center
We present two models for Arnold diffusion in the three-body problem. The first model is the spatial circular restricted three-body problem. We show that, on some fixed energy level, there exist trajectories near one of the libration points whose out-of-plane amplitude of motion changes from nearly zero to nearly the maximum value for that energ...
Gidea, Marian (Yeshiva University)
University of Minnesota, Institute for Mathematics and its Applications.