Results 31 to 40 of about 1,830,967 (336)

Non-perturbative Gauge Groups and Local Mirror Symmetry [PDF]

open access: yes, 2001
We analyze D-brane states and their central charges on the resolution of C^2/Z_n by using local mirror symmetry. There is a point in the moduli space where all n(n-1)/2 branches of the principal component of the discriminant locus coincide. We argue that
Skarke, H.
core   +2 more sources

Emergent unitarity, all-loop cuts and integrations from the ABJM amplituhedron

open access: yesJournal of High Energy Physics, 2023
We elaborate on aspects of a new positive geometry proposed recently, which was conjectured to be the four-point amplituhedron for ABJM theory. We study generalized unitarity cuts from the geometry, and in particular we prove that (1) the four-point ...
Song He   +3 more
doaj   +1 more source

Categorical Geometry and Integration Without Points [PDF]

open access: yesApplied Categorical Structures, 2012
The theory of integration over infinite-dimensional spaces is known to encounter serious difficulties. Categorical ideas seem to arise naturally on the path to a remedy. Such an approach was suggested and initiated by Segal in his pioneering article \cite{segal}.
Kriz, Igor, Pultr, Aleš
openaire   +2 more sources

Polylidar3D-Fast Polygon Extraction from 3D Data

open access: yesSensors, 2020
Flat surfaces captured by 3D point clouds are often used for localization, mapping, and modeling. Dense point cloud processing has high computation and memory costs making low-dimensional representations of flat surfaces such as polygons desirable.
Jeremy Castagno, Ella Atkins
doaj   +1 more source

Geometry without topology as a new conception of geometry [PDF]

open access: yes, 2001
A geometric conception is a method of a geometry construction. The Riemannian geometric conception and a new T-geometric one are considered. T-geometry is built only on the basis of information included in the metric (distance between two points).
Rylov, Yuri A.
core   +4 more sources

Geometry Students’ Arguments About a 1-Point Perspective Drawing

open access: yesREDIMAT, 2017
The practice of formulating and justifying claims is a fundamental aspect of doing mathematics, and in geometry, students’ use of diagrams is integral to how they establish arguments. We applied Toulmin’s model to examine 23 geometry students’ arguments
Anna F. DeJarnette, Gloriana Gonzalez
doaj   +1 more source

True coincidence summing correction factor for point source geometry with PHITS

open access: yesNuclear Engineering and Technology, 2023
In this study, it has been shown that the true coincidence summing correction factor can be obtained for the first time using the PHITS Monte Carlo program.
Esra Uyar
doaj   +1 more source

Efficient Large-Scale Point Cloud Geometry Compression

open access: yesSensors
Due to the significant bandwidth and memory requirements for transmitting and storing large-scale point clouds, considerable progress has been made in recent years in the field of large-scale point cloud geometry compression.
Shiyu Lu, Cheng Han, Huamin Yang
doaj   +1 more source

2D Triangulation of Signals Source by Pole-Polar Geometric Models

open access: yesSensors, 2019
The 2D point location problem has applications in several areas, such as geographic information systems, navigation systems, motion planning, mapping, military strategy, location and tracking moves.
Aleksandro Montanha   +3 more
doaj   +1 more source

Hamilton Geometry - Phase Space Geometry from Modified Dispersion Relations

open access: yes, 2018
Quantum gravity phenomenology suggests an effective modification of the general relativistic dispersion relation of freely falling point particles caused by an underlying theory of quantum gravity. Here we analyse the consequences of modifications of the
Barcaroli, Leonardo   +4 more
core   +1 more source

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