Results 11 to 20 of about 179 (111)
Analytic regularity for an operator with Treves curves
, 2004 We study a partial differential operator H with analytic coefficients, which is of the form “sum of squares”. H is hypoelliptic on any open subset of R3, yet possesses the following properties: (1) H is not analytic hypoelliptic on any open subset of R3 ...
Hanges, Nicholas
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Belowground effects of ground‐dwelling large herbivores in forest ecosystems
Journal of Animal Ecology, EarlyView.This study reviews how ground‐dwelling large herbivores affect forest soil and litter globally. Effects are context‐dependent, vary among species and forest types, and remain poorly studied in tropical forests, highlighting critical gaps in understanding nutrient cycling and ecosystem functioning.
Letícia Gonçalves Ribeiro +4 more
wiley +1 more source
A New Proof of Okaji’s Theorem for a Class of Sum of Squares Operators [PDF]
, 2009 Let P be a linear partial differential operator with analytic coefficients. We assume that P is of the form ""sum of squares"", satisfying Hormander's bracket condition. Let q be a characteristic point; for P.
Nicholas Hanges +3 more
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Social information about others' affective states in a human‐altered world
Journal of Animal Ecology, EarlyView.Faced with anthropogenic change, animals now encounter challenges different from their evolutionary past. To cope with such challenges, animals may use social information about others' affective states to guide their decisions. Considering affective states of wild animals could have important implications for animal welfare and wildlife conservation ...
Luca G. Hahn +4 more
wiley +1 more source
Assessing Spatiotemporal Side Effects of Diversionary Feeding on Mesopredators
Animal Conservation, EarlyView.We tested whether diversionary feeding alters the space use, aggregation, or activity patterns of mesopredators using a treatment‐control design with camera traps. Although both species frequently used feeding stations, diversionary feeding did not significantly affect their spatial distribution, aggregation, or temporal behaviour.
Pablo Palencia +5 more
wiley +1 more source
Remarks on Analytic Hypoellipticity
, 2002 We will compare the foIlowing ideas: analytic hypoeIlipticity on open subsets of Euclidean space; global analytic hypoeIlipticity; analytic hypoeIlipticity in the sense of germs.
Hanges, Nicholas
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Animal Conservation, EarlyView.In an urban‐adjacent forested area, we investigated the spatial and temporal distribution of the wild mammal community in relation to day‐to‐day fluctuations of human presence occurring between working days and weekends. We deployed 52 camera‐traps systematically within an EU Natura 2000 area located within the metropolitan area of Florence, central ...
Ilaria Greco +6 more
wiley +1 more source
Breast Angiosarcoma: 15‐Years Experience
ANZ Journal of Surgery, EarlyView.ABSTRACT Background Breast angiosarcoma is a rare, aggressive malignancy that can be primary (PAS) or secondary (SAS). This study evaluates the management and outcomes of breast angiosarcoma in a single‐center breast/surgical oncology unit. Methods A retrospective review was conducted on patients with histologically confirmed PAS or SAS who underwent ...
Gaik Si Quah +2 more
wiley +1 more source
The resolution of the Nirenberg-Treves conjecture
, 2003 In this paper we give a proof of the Nirenberg-Treves conjecture: that local solvability of principal type pseudo-differential operators is equivalent to condition ($Ψ$). This condition rules out certain sign changes of the imaginary part of the principal symbol along the bicharacteristics of the real part.
openaire +2 more sources
On a Model “Sum of Squares” Operator [PDF]
We study the real analytic and Gevrey regularity of the solutions to a type of “sum of squares” model operator, see (1), in two variables and obtain a result in agreement with Treves ...
Bove, Antonio, Mughetti, Marco
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