Results 21 to 30 of about 6,492,121 (341)
A bijection for essentially 3-connected toroidal maps [PDF]
European Journal of Combinatorics, 2021 We present a bijection for toroidal maps that are essentially $3$-connected ($3$-connected in the periodic planar representation). Our construction actually proceeds on certain closely related bipartite toroidal maps with all faces of degree $4$ except for a hexagonal root-face.
Bonichon, Nicolas +2 more
openaire +5 more sources
Design and development of semi-automatic concept map authoring support tool
Research and Practice in Technology Enhanced Learning, 2021 This research, to design and develop a concept map authoring support tool, adopts a semi-automatic concept mapping approach to help teachers create concept maps from English readings.
Aryo Pinandito +3 more
doaj +1 more source
Complete genomic and epigenetic maps of human centromeres
bioRxiv, 2021 Existing human genome assemblies have almost entirely excluded highly repetitive sequences within and near centromeres, limiting our understanding of their sequence, evolution, and essential role in chromosome segregation.
Nicolas Altemose +57 more
semanticscholar +1 more source
Nature Food, 2021 Spatiotemporally consistent data on global cropland extent is essential for tracking progress towards sustainable food production. In the present study, we present an analysis of global cropland area change for the first two decades of the twenty-first ...
P. Potapov +9 more
semanticscholar +1 more source
Mathematics, 2020 A simple theorem is presented that automatically generates the topological transversality theorem and Leray−Schauder alternatives for weakly upper semicontinuous, weakly compact maps. An application is given to illustrate our results.
Donal O’Regan
doaj +1 more source
Antioxidants, 2021 Sustainability, circular economy and alternative production systems are urgent imperatives for humanity and animal husbandry. Unless wasted, agri-food by-products can offer a promising source of high value.
Stefanos S. Andreadis +9 more
doaj +1 more source
Essential maps exist from to [PDF]
Proceedings of the American Mathematical Society, 1986 We show that [ BU,coker J ] ≠ 0 [{\text {BU,coker}}\,J] \ne 0 but that there are no infinite loop maps from BU to coker J J . The proofs involve the Segal conjecture.
M. Feshbach
semanticscholar +3 more sources
Spectral mapping theorems for essential spectra [PDF]
Mathematische Annalen, 1971 Definition 1. An open semioroup ~ of ~3 will be called an F-semigroup/f (i) a, b ~ ~3 and ab = ba E ~ imply a ~ ~ and b ~ ~, and (ii) there exists a closed ideal R such that ~ = q-1 (S), where S is an open semigroup in ~B/R containin 9 G and havin 9 the property that S\G is also open. It is clear that ~ contains the invertible elements of ~B, and that ~
GRAMSCH, Bernhard, LAY, David
openaire +2 more sources
Expert range maps of global mammal distributions harmonised to three taxonomic authorities
Journal of Biogeography, 2022 Comprehensive, global information on species' occurrences is an essential biodiversity variable and central to a range of applications in ecology, evolution, biogeography and conservation.
Charles J. Marsh +148 more
semanticscholar +1 more source
The Topological Transversality Theorem for Multivalued Maps with Continuous Selections
Mathematics, 2019 This paper considers a topological transversality theorem for multivalued maps with continuous, compact selections. Basically, this says, if we have two maps F and G with continuous compact selections and F ≅ G, then one map being essential ...
Donal O’Regan
doaj +1 more source