Theory contraction through base contraction

1991 ◽  
Vol 20 (2) ◽  
Author(s):  
Andr� Fuhrmann
Keyword(s):  
Theory Contraction ◽  
Base Contraction

Theory contraction and base contraction unified

1993 ◽  
Vol 58 (2) ◽  
pp. 602-625 ◽  
Author(s):  
Sven Ove Hansson
Keyword(s):  
Contraction Operator ◽  
Partial Meet Contraction ◽  
Belief Base ◽  
Theory Contraction ◽  
Axiomatic Characterizations ◽  
Base Contraction ◽  
Belief Set

AbstractOne way to construct a contraction operator for a theory (belief set) is to assign to it a base (belief base) and an operator of partial meet contraction for that base. Axiomatic characterizations are given of the theory contractions that are generated in this way by (various types of) partial meet base contractions.

Theory Contraction and Base Contraction Unified

2016 ◽  
pp. 219-245 ◽  
Author(s):  
Sven Ove Hansson
Keyword(s):  
Theory Contraction ◽  
Base Contraction

Theory Revision, Theory Contraction and Conditionals

2016 ◽  
pp. 145-157
Author(s):  
Dov M. Gabbay ◽  
Karl Schlechta
Keyword(s):  
Theory Revision ◽  
Revision Theory ◽  
Theory Contraction

How Many Urban Brownfields are Out There?: An Economic Base Contraction Analysis of 31 U.S. Cities

1998 ◽  
Vol 2 (3) ◽  
pp. 267-273 ◽  
Author(s):  
Robert A. Simons
Keyword(s):  
United States ◽  
Central City ◽  
The United States ◽  
Economic Base ◽  
Central Cities ◽  
Large Cities ◽  
Brownfield Sites ◽  
Definition Of ◽  
Restrictive Definition ◽  
Base Contraction

How many brownfield sites are there in the United States? Although numerous federal and state lists of contaminated lands are known—totaling more than 380,000 sites—there is no comprehensive estimate of unlisted or total brownfield sites. This article uses economic base contraction analysis to provide an estimate of the number and acreage of brownfield sites, by type and as a percentage of the land, in 31 large cities in the United States. This approach recognizes that brownfields are the outcome of years of decline in central-city manufacturing, trade, transportation, and residential uses. Using a moderately restrictive definition of brownfield, there are an estimated 75,000 formerly industrial brownfield sites in these U.S. central cities, on 93,000 acres. This is about 5% of the land area in these communities. Another 20,000 acres are present in these same cities in the form of residential brownfields. These findings imply that the overall number of nonresidential brownfields sites in the United States is at least 500,000 to 600,000 or more.

Theory-Contraction is NP-Complete

2003 ◽  
Vol 11 (6) ◽  
pp. 675-693 ◽  
Author(s):  
N. Tennant
Keyword(s):  
Theory Contraction ◽  
Np Complete

Belief base contraction by belief accrual

2019 ◽  
Vol 275 ◽  
pp. 78-103
Author(s):  
Cristhian A.D. Deagustini ◽  
M. Vanina Martinez ◽  
Marcelo A. Falappa ◽  
Guillermo R. Simari
Keyword(s):  
Belief Base ◽  
Base Contraction

Base Contraction and the Filtering Condition

2004 ◽  
pp. 227-236
Author(s):  
Isaac Levi
Keyword(s):  
Base Contraction

In defense of base contraction

Synthese ◽  
1992 ◽  
Vol 91 (3) ◽  
pp. 239-245 ◽  
Author(s):  
Sven Ove Hansson
Keyword(s):  
Base Contraction
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