We investigate the spectral properties of Schrdinger operators with point interactions, focusing attention on the interplay between level repulsion (von Neumann-Wigner theorem) and the symmetry of the confi.guration of point interactions. The explicit solution of the problem allows observing level ...
We investigate the spectral properties of Schrodinger operators with point interactions, focusing attention oil the interplay between level repulsion (von Neumann-Wigner theorem) and the symmetry of the configuration of point, interactions. The explicit solution of the problem allows observing level ...
We investigate the spectral properties of Schrdinger operators with point interactions, focusing attention on the interplay between level repulsion (von Neumann-Wigner theorem) and the symmetry of the confi.guration of point interactions. The explicit solution of the problem allows observing level repulsi...
George Pólya: The only student of mine I was ever intimidated by. He was so quick.There was a seminar for advanced students in Zürich that I was teaching and von Neumann was in the class. I came to a certain theorem, and I said it is not proved and it may be difficult. Von Neum...
The noncrossing rule for potential energy surfaces can be applied only, as originally postulated by von Neumann and Wigner, to slowly occurring changes; it has, however, over many years, been widely used to rationalize fast chemical reactions. Taking the conversion of Dewar benzene to benzene as...
The school had another outstanding mathematician one year ahead of von Neumann, namely Eugene Wigner. World War I had relatively little effect on von Neumanns education but, after the war ended, Béla Kun controlled Hungary for five months in 1919 with a Communist government. The Neumann family...
Von Neumann's theorem for linear relations 来自 学术范 喜欢 0 阅读量: 6 作者: A Sandovici 摘要: Assume that T is a linear relation acting between two real or complex Hilbert spaces H and K, respectively. T is shown to be closed if and only if the linear relations T * T and TT...
Absolute continuity of Hamiltonians with von Neumann-Wigner potentials For separated Dirac and Schrödinger operators whose potentials have oscillatory decaying terms the asymptotics of the eigenfunctions is determined. From... H Behncke - 《Proceedings of the American Mathematical Society》 被引量: 129...
Hamiltonians with strong Wigner–von Neumann potentials are known to possess bound states in the continuous spectrum. For smaller couplings these bound states become resonances, which appear as singularities of them‐function... H Behncke - 《Journal of Mathematical Physics》 被引量: 0发表: 1994...
John von Neumann Jakob von Uexküll C. H. Waddington John B. Watson Daniel Wegner Steven Weinberg Paul A. Weiss Herman Weyl John Wheeler Jeffrey Wicken Wilhelm Wien Norbert Wiener Eugene Wigner E. O. Wilson Günther Witzany Stephen Wolfram ...