Minimal generation of basic semi-algebraic sets over an arbitrary ordered field

Author(s):  
M. Marshall ◽  
L. Walter

1999 ◽  
Vol 65 (1-2) ◽  
pp. 54-76 ◽  
Author(s):  
Yves Diers


1955 ◽  
Vol 77 (3) ◽  
pp. 541
Author(s):  
R. J. Levit


2014 ◽  
Vol 142 (12) ◽  
pp. 4127-4132
Author(s):  
W. M. Schmidt ◽  
U. Zannier
Keyword(s):  




2021 ◽  
Vol 60 (2) ◽  
pp. 115-127
Author(s):  
N. S. Romanovskii
Keyword(s):  


2021 ◽  
Vol 25 (1) ◽  
pp. 4-35
Author(s):  
Ariel Meraiot ◽  
Avinoam Meir ◽  
Steve Rosen

By taking a small-scale perspective, Bedouin pastoral space in the Israeli Negev in the modern period has been misinterpreted as chaotic by various Israeli institutions. In critiquing this ontology we suggest that a knowledge gap with regard to an appropriate scale of understanding Bedouin settlement patterns and mechanisms of sedentarisation is at its root, and that a larger-scale analysis indicates that their space is in fact highly ordered. Field surveys and interviews with the local Bedouin showed that household cultivation plots in the Negev Highland during the period of the British Mandate were organised at a large scale through natural and man-made landscape features reflecting their structure, development and deployment in a highly ordered space. This analysis carries significant implications for understanding pastoral spaces at the local scale, particularly offering better comprehension of various sedentary forms and suggesting new approaches to sustainable planning and development for the Bedouin.





1991 ◽  
Vol 56 (3) ◽  
pp. 1016-1025 ◽  
Author(s):  
H. Jerome Keisler ◽  
James H. Schmerl

AbstractIn a nonstandard universe, the κ-saturation property states that any family of fewer than κ internal sets with the finite intersection property has a nonempty intersection. An ordered field F is said to have the λ-Bolzano-Weierstrass property iff F has cofinality λ and every bounded λ-sequence in F has a convergent λ-subsequence. We show that if κ < λ are uncountable regular cardinals and βα < λ whenever α < κ and β < λ then there is a κ-saturated nonstandard universe in which the hyperreal numbers have the λ-Bolzano-Weierstrass property. The result also applies to certain fragments of set theory and second order arithmetic.



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