Results 21 to 30 of about 948,157 (255)

Essentiality for Mönch type maps [PDF]

open access: yesProceedings of the American Mathematical Society, 2000
A new fixed point theorem for Mönch maps on locally convex spaces is given. In addition, a continuation theorem for Mönch maps is presented.
Agarwal, R.P., O'Regan, D.
openaire   +2 more sources

How 2.5D Maps Design Improve the Wayfinding Performance and Spatial Ability of Map Users

open access: yesInformatics, 2021
Useful information can be provided by 2.5D maps that can take advantage of the additional dimension. However, aside from stereoscopic landmarks, optimal methods for presenting other essential information is unclear.
Meng-Cong Zheng, Yi-Wen Hsu
doaj   +1 more source

Essential mappings and transfinite dimension [PDF]

open access: yesFundamenta Mathematicae, 1985
If \(\alpha\) is a countable ordinal, \(J^{\alpha}\) is \textit{D. W. Henderson}'s \(\alpha\)-dimensional absolute retract [ibid. 63, 167-173 (1968; Zbl 0167.513)] and Ind \(X\geq \alpha\), is there an essential \(f: X\to J^{\alpha}?\) The authors answer this question in the affirmative if \(\alpha =\omega\) and X is normal and in the negative if ...
Borst, P., Dijkstra, J. J.
openaire   +2 more sources

Some General Theorems for Compact Acyclic Multifunctions

open access: yesMathematics, 2019
We present general Leray-Schauder type theorems for compact acyclic Multifunctions, using the topological transversality theorem by the author.
Donal O’Regan
doaj   +1 more source

Topological Transversality Principles and General Coincidence Theory

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017
This paper presents general topological coincidence principles for multivalued maps defined on subsets of completely regular topological spaces.
O’Regan Donal
doaj   +1 more source

High-Precision Depth Map Estimation from Missing Viewpoints for 360-Degree Digital Holography

open access: yesApplied Sciences, 2022
In this paper, we propose a novel model to extract highly precise depth maps from missing viewpoints, especially for generating holographic 3D content. These depth maps are essential elements for phase extraction, which is required for the synthesis of ...
Hakdong Kim   +5 more
doaj   +1 more source

Landsat-based remapping of the south-western Kalahari

open access: yesKoedoe: African Protected Area Conservation and Science, 1990
Landsat-4 remote sensing is used to construct distortion-free maps of the almost trackless southern Kalahari Desert. These maps show the geography of natural pans, riverbeds and artificial water holes, and are improved versions of previous maps. The maps
J. du P. Bothma, D.R. Swart
doaj   +1 more source

IMPLEMENTING NATURAL RESOURCES CADASTRAL PLAN IN PASARGADAE DISTRICT OF IRAN BY USING QUICK BIRD IMAGES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Natural Resources are essential for security and sustainable development of each country. Therefore, in order to reach sustainable development, conservation as well as optimum utilization of natural resources, executing of natural resources cadastral ...
G. H. Azhdari, K. Deilami, E. Firooznia
doaj   +1 more source

Abstract Leray–Schauder Type Alternatives and Extensions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019
We present a Leray–Schauder type alternative for a general class of maps. This enables us to obtain some Birkhoff–Kellogg type results and a Furi–Pera result.
O’Regan Donal
doaj   +1 more source

Leray–Schauder Alternatives for Maps Satisfying Countable Compactness Conditions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019
In this paper we present Leray–Schauder alternatives for a general class of Mönch type maps.
O’Regan Donal
doaj   +1 more source

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