Results 131 to 140 of about 9,067 (308)
Improved Bounds for Restricted Isometry Constants [PDF]
, 2012 The purpose of this paper is to establish improved bounds for restricted isometry constants δk.
Jigen Peng, Jiabing Ji
core +1 more source
Spherical Isometries are Hyporeflexive
Rocky Mountain Journal of Mathematics, 1999 If \(\mathcal M \subset L(H)\), then \(\mathcal W(\mathcal M)\) is the smallest weakly closed subalgebra of \(L(H)\) containing \(\mathcal M\) and Alg Lat \(\mathcal M\) is the algebra of all operators leaving invariant all subspaces which are invariant for all operators from \(\mathcal M\). \(\mathcal M\) is called reflexive if \(\mathcal W(\mathcal M)
Müller, Vladimír, Ptak, Marek
openaire +2 more sources
The Anatomical Record, EarlyView.Abstract Neuroanatomical research has progressed considerably in several vertebrate lineages, yet studies of reptilian brain morphology remain markedly underdeveloped. Here we provide the first description of macroscopic brain anatomy and its ontogeny in the viperid Bothrops moojeni, based on a sample of seven individuals.
Paula Araújo +2 more
wiley +1 more source
Clade‐wide morphological and functional variation of the sauropsid columella
The Anatomical Record, EarlyView.Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock +4 more
wiley +1 more source
On the Relation Between Distances and Seminorms on Fréchet Spaces, with Application to Isometries
MathematicsA study is made of linear isometries on Fréchet spaces for which the metric is given in terms of a sequence of seminorms. This establishes sufficient conditions on the growth of the function that defines the metric in terms of the seminorms to ensure ...
Isabelle Chalendar +2 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Triassic pseudosuchians had highly diversified cranial morphologies. These archosaurs occupied diverse ecological roles, ranging from terrestrial predators and herbivores to semiaquatic ambush predators and possible waders. Here, we apply linear cranial morphometrics to assess possible convergences with other sauropsids from the clades ...
Rafael Terras +3 more
wiley +1 more source
Classification of Three-Dimensional Contact Metric Manifolds with Almost-Generalized
MathematicsThis work investigates the classification of three-dimensional complete contact metric manifolds that are non-Sasakian and satisfy the relation Qξ=σξ, focusing on those that support an almost-generalized Ƶ-soliton. In the scenario where σ is constant, we
Shahroud Azami +2 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Fishes of the genus Enchodus were abundant and cosmopolitan in the Late Cretaceous, but are primarily known from isolated remains in Canada. Four well‐preserved fish skulls were recovered in recent years from ammolite mines sampling the Bearpaw Formation of Southern Alberta, and are here referred to Enchodus petrosus Cope, 1874.
Luke E. Nelson +2 more
wiley +1 more source
The Symmetry Concept of the Basic Education Teachers
JETEN, 2016 The curricular changes that have occurred with the Mathematics syllabus of 2007 and 2013 showed, among other situations, the introduction of new contents and the conceptual change of symmetry. For the teachers, these changes require scientific updates to
Angela Couto, Cláudia Maia-Lima
doaj
Arthroscopy, EarlyView.Recurrent anterior shoulder instability (RASI) is frequently seen especially in young collision and contact athletes. The glenohumeral joint stability is often compromised by associated Hill‐Sachs and Bankart lesions. In young and active patients with high risk of recurrence or failed nonoperative therapy a surgical treatment is indicated to stabilize ...
Matthias Brockmeyer
wiley +1 more source