Kasper, Karl

Kasper, Karl, Bunter Traum auf gewebtem Grund aus der Wunderwelt des Stoffdrucks, ... 

As the number of atoms in the asyimnetric unit increases, the solution of a structure by any of these phase-independent methods becomes more difficult, and by 1950 a PhD thesis could be based on a single crystal structure. At about that time, however, several groups observed that the fact that the electron density must be non-negative everywhere could be exploited to place restrictions on possible phases. The first use of this fact was by D Marker and J S Kasper [24], but their relations were special cases of more general relations introduced by J Karle and H Hauptman [25]. Denoting by A. the set of indices h., k., /., the Karle-Hauptman condition states that all matrices of the fonu... 

S. Busche (El) M. Kasper T. Mutschler N. Leopold G. Gauglitz Eberhard-Karls-University, Institute of Physical and Theoretical Chemistry,... 

What are traditionally termed direct methods (Harker and Kasper, 1947 Hauptman and Karle, 1952 Sayer, 1952), also referred to as ab initio methods, had until recently made rather... 

KARLE J KARP GS KARPOV VL KARRIKER JM KARTHA CG KARTZMARK E M KARWAT E KASATKIN A G KASHAEV SKHG KASHIMURA T KASPER JVV KASTORSKII L P... 

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