Results 301 to 310 of about 3,366,340 (357)

Biomimetic Wings for Micro Air Vehicles. [PDF]

open access: yesBiomimetics (Basel)
Moscato G, Romano GP.
europepmc   +1 more source

On the foundations of incidence geometry

Geometriae Dedicata, 1988
The tremendous and sudden development of diagram geometries and related concepts such as chamber systems, combinatorial maps, incidence complexes (see for instance [2], [14], [15], [3]) and their application to finite group theory (see [1], [11], [12]) justifies a careful study of the foundations of the subject, somewhat in the spirit of abstract ...
Buekenhout, Francis, Buset, Dominique
openaire   +3 more sources

The complexity of plane hyperbolic incidence geometry is ????

MLQ, 2005
We show that plane hyperbolic geometry, expressed in terms of points and the ternary relation of collinearity alone, cannot be expressed by means of axioms of complexity at most ∀∃∀, but that there is an axiom system, all of whose axioms are ∀∃∀∃ sentences. This remains true for Klingenberg's generalized hyperbolic planes, with arbitrary ordered fields
V. Pambuccian
openaire   +3 more sources

Modal logics for incidence geometries

Journal of Logic and Computation, 1997
Incidence geometry is based on two-sorted structures consisting of ‘points’ and ‘lines’ together with an intersort binary relation called incidence. We introduce an equivalent one-sorted geometrical structure, called incidence frame, which is suitable for modal considerations.
Balbiani, Philippe   +3 more
openaire   +4 more sources

Incidence and Metric Geometry

1981
In this section we shall define the notions of an abstract geometry and an incidence geometry. These are given by listing a set of axioms that must be satisfied. After the definitions are made, we will give a number of examples which will serve as models for these geometries.
George D. Parker, Richard S. Millman
openaire   +2 more sources

on the incidence geometry of grassmann spaces

Geometriae Dedicata, 1999
In this paper we identify some properties on the point-line structure of Grassmannians which are useful tools to characterize the incidence geometry of Grassmann varieties and of their special quotients.
FERRARA DENTICE, Eva, MELONE N.
openaire   +3 more sources

Left ventricular geometry and risk of incident hypertension [PDF]

open access: possibleHeart, 2019
ObjectiveLeft ventricular (LV) geometry change is an independent predictor for cardiovascular disease. However, data are equivocal on the association of echocardiographic parameters of LV geometry with incident hypertension. Thus, we were to investigate the risk of hypertension according to the baseline echocardiographic parameters of LV geometry ...
Sung Keun Park   +4 more
openaire   +2 more sources

Preliminaries and Incidence Geometry (I)

2015
This chapter contains a brief summary of several types of mathematical knowledge needed to read this book, including the elements of logic, set theory, mapping theory, and algebraic structures such as number systems and vector spaces. Definitions of basis, dimension, linear mappings, isomorphism, matrices and determinants are given; there is also ...
Keith G. Calkins   +3 more
openaire   +2 more sources

Two incidence propositions in chain geometries

Monatshefte für Mathematik, 2011
The significance of the incidence propositions (Z) and (B) for chain geometries Σ(F, A, J) is determined. In preparation the structure of kinematic and nearquadratic Jordan systems is studied.
Münevver Özcan, Armin Herzer
openaire   +2 more sources

Home - About - Disclaimer - Privacy