Finite approximability of the I? calculus and the existence of an extension having no model

1981 ◽  
Vol 29 (6) ◽  
pp. 463-468 ◽  
Author(s):  
A. Yu. Muravitskii
Keyword(s):  
Finite Approximability

On finite approximability of ?-intermediate logics

Studia Logica ◽  
1982 ◽  
Vol 41 (1) ◽  
pp. 67-73
Author(s):  
Wies?aw Dziobiak
Keyword(s):  
Intermediate Logics ◽  
Finite Approximability

scholarly journals Brownian motion and finite approximations of quantum systems over local fields

2017 ◽  
Vol 29 (05) ◽  
pp. 1750016 ◽  
Author(s):  
Erik Makino Bakken ◽  
Trond Digernes ◽  
David Weisbart
Keyword(s):  
Brownian Motion ◽  
Random Walks ◽  
Local Field ◽  
Schrödinger Operators ◽  
Quantum Systems ◽  
Local Fields ◽  
Schrodinger Operators ◽  
Finite Systems ◽  
Finite Approximations ◽  
Finite Approximability

We give a stochastic proof of the finite approximability of a class of Schrödinger operators over a local field, thereby completing a program of establishing in a non-Archimedean setting corresponding results and methods from the Archimedean (real) setting. A key ingredient of our proof is to show that Brownian motion over a local field can be obtained as a limit of random walks over finite grids. Also, we prove a Feynman–Kac formula for the finite systems, and show that the propagator at the finite level converges to the propagator at the infinite level.

AN EXAMPLE OF A SUBGROUP SEPARABLE BUT NOT CONJUGACY SEPARABLE GROUP

2012 ◽  
Vol 22 (08) ◽  
pp. 1240006 ◽  
Author(s):  
S. C. CHAGAS ◽  
K. S. DE OLIVEIRA ◽  
P. A. ZALESSKII
Keyword(s):  
Finiteness Conditions ◽  
Separable Group ◽  
Graphs Of Groups ◽  
The Third ◽  
Closed Orbits ◽  
Finite Approximability ◽  
Amalgamated Products ◽  
Conjugacy Separable

We give an example of a conjugacy separable, but not subgroup separable group. It is an adaptation of an example of Tavgen and the third author from [Closed orbits and finite approximability with respect to conjugacy of free amalgamated products, Math. Notes58 (1995) 1042–1048] to a theorem of Raptis [On finiteness conditions of certain graphs of groups, Internat. J. Algebra Comput.5 (1995) 719–724].

Finite approximability of metabelian groups

1968 ◽  
Vol 7 (4) ◽  
pp. 268-272 ◽  
Author(s):  
V. N. Remeslennikov
Keyword(s):  
Metabelian Groups ◽  
Finite Approximability
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