Results 51 to 60 of about 6,492,121 (341)

Essential Oils from Six Aromatic Plants of Langtang National Park: Insights on Their Chemical Constituents via GC-MS Analysis

open access: yesSeparations, 2023
The present work aims to provide an insight on the chemical constituents of essential oils obtained from six aromatic plants of the Langtang National Park (LNP), Nepal. LNP harbors an enriched biodiversity of medicinal and aromatic plants (MAPs).
Samjhana Pradhan   +3 more
doaj   +1 more source

Multivalued H-essential maps of acyclic type on Hausdorfftopological spaces

open access: yes, 2006
This paper discusses acyclic maps between topological spaces. We show that if F is H-essential and F≅G, then G has a fixed point.
D. O’Regan
semanticscholar   +1 more source

Automatic Building and Labeling of HD Maps with Deep Learning [PDF]

open access: yesAAAI Conference on Artificial Intelligence, 2020
In a world where autonomous driving cars are becoming increasingly more common, creating an adequate infrastructure for this new technology is essential. This includes building and labeling high-definition (HD) maps accurately and efficiently. Today, the
Mahdi Elhousni   +3 more
semanticscholar   +1 more source

Partially Isometric Immersions and Free Maps

open access: yes, 2010
In this paper we investigate the existence of ``partially'' isometric immersions. These are maps f:M->R^q which, for a given Riemannian manifold M, are isometries on some sub-bundle H of TM.
D'Ambra, Giuseppina   +2 more
core   +1 more source

On Phantom Maps into co-H-spaces

open access: yes, 2016
We study the existence of essential phantom maps into co-H-spaces, motivated by Iriye's observation that every suspension space $Y$ of finite type with $H_i(Y;\QQ)\neq 0$ for some $i>1$ is the target of essential phantom maps.
Schwass, James
core   +1 more source

Essential Maps and Embeddings of Annuli in Nonorientable M 3 [PDF]

open access: yesProceedings of the American Mathematical Society, 1974
In this note we give an example which shows that the existence of an essential map of an annulus in a nonorientable 3 3 -manifold does not guarantee the existence of an essential embedding in that manifold.
R. J. Daigle, C. D. Feustel
openaire   +2 more sources

Seed plant features, distribution patterns, diversity hotspots, and conservation gaps in Xinjiang, China

open access: yesNature Conservation, 2018
The flora in Xinjiang is unique. Decisions about biodiversity conservation and management based on seed plant diversity hotspots and conservation gaps in Xinjiang are essential to maintain this unique flora.
Jihong Huang   +8 more
doaj   +3 more sources

Essential maps and embeddings of annuli in nonorientable

open access: yes, 1974
In this note we give an example which shows that the existence of an essential map of an annulus in a nonorientable 3-manifold does not guarantee the existence of an essential embedding in that manifol d.
R. J. Daigle, C. Feustel
semanticscholar   +1 more source

Gradient Young measures generated by quasiconformal maps in the plane

open access: yes, 2015
In this contribution, we completely and explicitly characterize Young measures generated by gradients of quasiconformal maps in the plane. By doing so, we generalize the results of Astala and Faraco \cite{AstalaFaraco} who provided a similar result for ...
Benešová, Barbora, Kampschulte, Malte
core   +1 more source

An essential spectra mapping theorem

open access: yesJournal of Mathematical Analysis and Applications, 1976
AbstractLet T be a closed operator on a Hilbert Space H, such that α ϵ p(T), the resolvent of T. Set A = (T − αI)−1. For μ ≠ 0, define λ such that (λ − α)μ = 1. It is shown that λ ϵ essential spectra of T iff μ ϵ essential spectra of A for various definitions of the essential spectra. A number of immediate corollaries are then derived.
openaire   +2 more sources

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