Results 31 to 40 of about 866,589 (283)

Invariants of combinatorial line arrangements and Rybnikov's example [PDF]

open access: yesAdvanced Studies in Pure Mathematics, 2019
Following the general strategy proposed by G.Rybnikov, we present a proof of his well-known result, that is, the existence of two arrangements of lines having the same combinatorial type, but non-isomorphic fundamental groups. To do so, the Alexander Invariant and certain invariants of combinatorial line arrangements are presented and developed for ...
Artal Bartolo, Enrique   +3 more
openaire   +4 more sources

Kreck-Stolz invariants for quaternionic line bundles

open access: yes, 2012
We generalise the Kreck-Stolz invariants s 2 s_2 and s 3 s_3 by defining a new invariant, the t t -invariant, for quaternionic line bundles  E E ...
Crowley, D., Goette, S.
core   +1 more source

Red wood Ants (Formica rufa-group) prefer mature pine forests in Variscan granite environments (Hymenoptera: Formicidae)

open access: yesFragmenta entomologica, 2022
We used presence/absence data of 5,160 red wood ant nests (RWA; Formica polyctena) acquired in a systematic large-scale area-wide survey in two study areas (≈350 ha) in the Oberpfalz, NE Bavaria, Germany to explore for the first time the influence of ...
Gabriele M. Berberich   +2 more
doaj   +1 more source

On an invariance principle for phase separation lines☆ [PDF]

open access: yesAnnales de l'Institut Henri Poincare (B) Probability and Statistics, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Greenberg, Lev, Ioffe, Dmitry
openaire   +2 more sources

Center problem for quartic differential systems with an affine invariant straight line of maximal multiplicity

open access: yesActa et Commentationes: Ştiinţe Exacte şi ale Naturii
In this paper the quartic differential systems with a center-focus critical point and non-degenerate infinity are examined. We show that in this family the maximal multiplicity of an affine invariant straight line is six. Modulo the affine transformation
Olga Vacaraș
doaj   +1 more source

The Darboux transformation and algebraic deformations of shape-invariant potentials [PDF]

open access: yes, 2003
We investigate the backward Darboux transformations (addition of a lowest bound state) of shape-invariant potentials on the line, and classify the subclass of algebraic deformations, those for which the potential and the bound states are simple ...
Gomez-Ullate, David   +2 more
core   +3 more sources

Yang-Baxter invariants for line configurations [PDF]

open access: yesDiscrete & Computational Geometry, 1996
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

open access: yesFEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi   +5 more
wiley   +1 more source

The Invariant Measures of some Infinite Interval Exchange Maps

open access: yes, 2015
We classify the locally finite ergodic invariant measures of certain infinite interval exchange transformations (IETs). These transformations naturally arise from return maps of the straight-line flow on certain translation surfaces, and the study of the
Cheung   +9 more
core   +1 more source

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