scholarly journals A sparse regular approximation lemma

2019 ◽  
Vol 371 (10) ◽  
pp. 6779-6814 ◽  
Author(s):  
Guy Moshkovitz ◽  
Asaf Shapira
Keyword(s):  
Regular Approximation ◽  
Approximation Lemma

scholarly journals Regular approximation of singular Sturm–Liouville problems with eigenparameter dependent boundary conditions

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Maozhu Zhang ◽  
Kun Li ◽  
Hongxiang Song
Keyword(s):  
Boundary Conditions ◽  
Operator Theory ◽  
Resolvent Convergence ◽  
Spectral Inclusion ◽  
Regular Approximation ◽  
Special Cases ◽  
Abstract Operator ◽  
Norm Resolvent Convergence ◽  
Sturm Liouville ◽  
Spectral Exactness

AbstractIn this paper we consider singular Sturm–Liouville problems with eigenparameter dependent boundary conditions and two singular endpoints. The spectrum of such problems can be approximated by those of the inherited restriction operators constructed. Via the abstract operator theory, the strongly resolvent convergence and norm resolvent convergence of a sequence of operators are obtained and it follows that the spectral inclusion of spectrum holds. Moreover, spectral exactness of spectrum holds for two special cases.

scholarly journals Geometry optimizations in the zero order regular approximation for relativistic effects

1999 ◽  
Vol 110 (18) ◽  
pp. 8943-8953 ◽  
Author(s):  
Erik van Lenthe ◽  
Andreas Ehlers ◽  
Evert-Jan Baerends
Keyword(s):  
Relativistic Effects ◽  
Zero Order ◽  
Regular Approximation

Relativistic Effects for NMR Shielding Constants in Transition Metal Oxides Using the Zeroth-Order Regular Approximation

2000 ◽  
Vol 104 (23) ◽  
pp. 5600-5611 ◽  
Author(s):  
R. Bouten ◽  
E. J. Baerends ◽  
E. van Lenthe ◽  
L. Visscher ◽  
G. Schreckenbach ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Relativistic Effects ◽  
Zeroth Order ◽  
Regular Approximation ◽  
Shielding Constants

scholarly journals Refinements of the holonomic approximation lemma

2018 ◽  
Vol 18 (4) ◽  
pp. 2265-2303 ◽  
Author(s):  
Daniel Álvarez-Gavela
Keyword(s):  
Approximation Lemma

scholarly journals Regular Approximation of Link Grammar

2006 ◽  
pp. 564-575 ◽  
Author(s):  
Filip Ginter ◽  
Sampo Pyysalo ◽  
Jorma Boberg ◽  
Tapio Salakoski
Keyword(s):  
Regular Approximation ◽  
Link Grammar
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