Results 31 to 40 of about 25,073 (181)

Influence of a traditional flea market on property prices in its surroundings – a case study in Porto Alegre, Brazil

open access: yesAestimum
Flea markets are important as economic and cultural phenomenon in several cities around the world. There is little attention to their influence on real estate prices. The “Brique da Redenção” occur every weekend since 1978 in Porto Alegre, Brazil.
Marco Aurelio Stumpf Gonzalez
doaj   +1 more source

Why Polyhedra Matter in Non-Linear Equation Solving

open access: yes, 2002
We give an elementary introduction to some recent polyhedral techniques for understanding and solving systems of multivariate polynomial equations. We provide numerous concrete examples and illustrations, and assume no background in algebraic geometry or
Rojas, J. Maurice
core   +2 more sources

N\'eron-Severi groups under specialization [PDF]

open access: yes, 2010
Andr\'e used Hodge-theoretic methods to show that in a smooth proper family X to B of varieties over an algebraically closed field k of characteristic 0, there exists a closed fiber having the same Picard number as the geometric generic fiber, even if k ...
Maulik, Davesh, Poonen, Bjorn
core   +2 more sources

Conjugate complex homogeneous spaces with non-isomorphic fundamental groups [PDF]

open access: yes, 2015
Let X=G/H be the quotient of a connected reductive algebraic C-group G defined over the field of complex numbers C by a finite subgroup H. We describe the topological fundamental group of the homogeneous space X, which is nonabelian when H is nonabelian.
Borovoi, Mikhail, Cornulier, Yves
core   +3 more sources

On contractible curves on normal surfaces

open access: yes, 1999
We characterize contractible curves on proper normal algebraic surfaces in terms of complementary Weil divisors. Using this we generalize the classical criteria of Castelnuovo and Artin. As application we derive a finiteness result on homogeneous spectra
Schroeer, Stefan
core   +2 more sources

Le remploi de la brique dans l’Antiquité tardive. Le cas toulousain

open access: yesArchéopages, 2010
In Roman Toulouse bricks are the only building material used for both private and public build-ings. They were produced in the Gallo-Roman city in the 1st century AD only ; in the 2nd and 3rd centuries AD builders reused them, preferring those that had ...
Raphaël De Filippo
doaj   +1 more source

La place de la brique crue dans la construction en Alsace aux périodes du haut Moyen Âge et du Moyen Âge central (vie-xiie s.) : un nouveau regard porté sur l’histoire de ce matériau

open access: yesArchéologie Médiévale, 2023
Around twenty years ago, the discovery of mudbrick in an 11th-century dwelling in Alsace provided the first evidence that mud-brick architecture continued beyond the Roman period.
Madeleine Châtelet
doaj   +1 more source

Computing noncommutative deformations of presheaves and sheaves of modules

open access: yes, 2007
We describe a noncommutative deformation theory for presheaves and sheaves of modules that generalizes the commutative deformation theory of these global algebraic structures, and the noncommutative deformation theory of modules over algebras due to ...
Beılinson   +16 more
core   +2 more sources

La casa rural en Ciudad Real en el siglo XVI, según las «Relaciones Topográficas de Felipe II».

open access: yesEstudios Geográficos, 1990
Estas «Relaciones» permiten conocer rasgos esenciales. Domina la casa de una sola planta, con paredes de tierra apisonada («tapia») y en bastantes casos cimientos de piedra; se usa muy poco el ladrillo, poco la cal y el yeso.
Julia López Gómez   +1 more
doaj   +1 more source

Algebraic Independence and Mahler's method [PDF]

open access: yes, 2011
We give some new results on algebraic independence within Mahler's method, including algebraic independence of values at transcendental points. We also give some new measures of algebraic independence for infinite series of numbers.
Becker   +7 more
core   +4 more sources

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