On the theory of infinite linear and quasilinear automata

Cybernetics ◽  
1974 ◽  
Vol 7 (4) ◽  
pp. 580-593
Author(s):  
V. P. Zarovnyi
Keyword(s):  
OPSEARCH ◽  
2005 ◽  
Vol 42 (3) ◽  
pp. 288-296
Author(s):  
K. C. Sivakumar ◽  
J. Mercy Swarna

Optimization ◽  
2005 ◽  
Vol 54 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Juan A. Gómez † ◽  
Paul J. Bosch ‡ ◽  
Jorge Amaya

2007 ◽  
Vol 72 (1) ◽  
pp. 171-206 ◽  
Author(s):  
Denis R. Hirschfeldt ◽  
Richard A. Shore

AbstractWe investigate the complexity of various combinatorial theorems about linear and partial orders, from the points of view of computability theory and reverse mathematics. We focus in particular on the principles ADS (Ascending or Descending Sequence), which states that every infinite linear order has either an infinite descending sequence or an infinite ascending sequence, and CAC (Chain-AntiChain), which states that every infinite partial order has either an infinite chain or an infinite antichain. It is wellknown that Ramsey's Theorem for pairs () splits into a stable version () and a cohesive principle (COH). We show that the same is true of ADS and CAC, and that in their cases the stable versions are strictly weaker than the full ones (which is not known to be the case for and ). We also analyze the relationships between these principles and other systems and principles previously studied by reverse mathematics, such as WKL0, DNR, and BΣ2. We show, for instance, that WKL0 is incomparable with all of the systems we study. We also prove computability-theoretic and conservation results for them. Among these results are a strengthening of the fact, proved by Cholak, Jockusch, and Slaman, that COH is -conservative over the base system RCA0. We also prove that CAC does not imply DNR which, combined with a recent result of Hirschfeldt, Jockusch. Kjos-Hanssen, Lempp, and Slaman, shows that CAC does not imply (and so does not imply ). This answers a question of Cholak, Jockusch, and Slaman.Our proofs suggest that the essential distinction between ADS and CAC on the one hand and on the other is that the colorings needed for our analysis are in some way transitive. We formalize this intuition as the notions of transitive and semitransitive colorings and show that the existence of homogeneous sets for such colorings is equivalent to ADS and CAC, respectively. We finish with several open questions.


2005 ◽  
Vol 128 (1) ◽  
pp. 167-174 ◽  
Author(s):  
LiMin Zhu ◽  
Ye Ding ◽  
Han Ding

This paper presents a novel methodology for evaluating spatial straightness error based on the minimum zone criterion. Spatial straightness evaluation is formulated as a linear complex Chebyshev approximation problem, and then reformulated as a semi-infinite linear programming problem. Both models for the primal and dual programs are developed. An efficient simplex-based algorithm is employed to solve the dual linear program to yield the straightness value. Also a general algebraic criterion for checking the optimality of the solution is proposed. Numerical experiments are given to verify the effectiveness and efficiency of the presented algorithm.


1984 ◽  
Vol 27 (3) ◽  
pp. 313-319 ◽  
Author(s):  
P. Holgate

The definitions of finite dimensional baric, train, and special train algebras, and of genetic algebras in the senses of Schafer and Gonshor (which coincide when the ground field is algebraically closed, and which I call special triangular) are given in Worz-Busekros's monograph [8]. In [6] I introduced applications requiring infinite dimensional generalisations. The elements of these algebras were infinite linear forms in basis elements a0, a1,… and complex coefficients such that In this paper I consider only algebras whose elements are forms which only a finite number of the xi are non zero.


2021 ◽  
pp. 126-133
Author(s):  
N. P. KARPENKO ◽  
◽  
E. S. BEGLYAROVA ◽  
S. A. SOKOLOVA ◽  
T. I. MATVEEVA

The purpose of the investigations is an assessment of filtration calculations of water lowering during construction works and laying engineering communications at the water catchment of the Likhoborka and Zhabenka rivers. There are considered hydrogeological questions of filtration calculations at construction and laying urban and rain sewers on the territory of the Dmitrovskoe highway in the Northern administrative district of Moscow. It is revealed that the main factors affecting hydrogeological conditions in the area of construction of engineering communications is water lowering. The dependences on the estimation of filtration calculations of water lowering in the area of construction of engineering communications are analyzed. Analytical dependences for the scheme of an infinite linear source of perturbation in the infinite layer are proposed and improved. It is established that the average costs are proportionally dependent to the level of water lowering in the water lowering area,and the relationship between average costs, regardless of the calculated linear scheme, is linear. A model for filtration calculations has been developed in Microsoft Excel. The model calculations showed that the maximum decrease in the estimated point of a multi-story non-residential administrative building does not exceed the values of the maximum allowable deformations.


2000 ◽  
Author(s):  
Stef H. Tijs ◽  
Judith Timmer ◽  
Natividad Llorca ◽  
J. Sánchez Soriano
Keyword(s):  
The Core ◽  

Sign in / Sign up

Export Citation Format

Share Document