Results 31 to 40 of about 2,470 (304)
Positivity preservers forbidden to operate on diagonal blocks [PDF]
, 2023 The question of which functions acting entrywise preserve positive semidefiniteness has a long history, beginning with the Schur product theorem [Crelle 1911], which implies that absolutely monotonic functions (i.e., power series with nonnegative ...
Vishwakarma, Prateek Kumar +1 more
core +1 more source
International Journal of Digital Curation, 2009 The Digital Preservation Program of the California Digital Library (CDL) is engaged in a process of reinvention involving significant transformations of its outlook, effort, and infrastructure. This includes a re-articulation of its mission in terms of digital curation, rather than preservation; encouraging a programmatic, rather than a project ...
Stephen Abrams +2 more
openaire +9 more sources
Additive preservers of numerical range [PDF]
, 2002 We characterize all additive mappings preserving (classical) numerical range on various subalgebras of Mn: the subalgebra of all diagonal matrices Dn, the subalgebra of all (upper) triangular matrices Tn and subalgebras of block diagonal and block ...
Gorazd Lešnjak, Lešnjak, Gorazd
core +1 more source
Strong k-Skew Commutativity Preserving Maps on Standard Operator Algebras
AxiomsLet A be a self-adjoint standard operator algebra on a real or complex Hilbert space of dimension ≥2, and let k∈{1,2,3}. The k-skew commutator for A,B∈A is defined by [A,B]1∗=AB−BA∗ and [A,B]k∗=[A,[A,[A,B]k−1∗1]1∗.
Ting Zhang, Xiaofei Qi
doaj +1 more source
HUMAN CAPITAL AND HIGHER EDUCATION IN ROMANIA IN THE LAST YEARS [PDF]
Annals of the University of Petrosani: Economics, 2011 The paper underlines and analyses the role of human capital, as well as some issues related to higher education and research in Romania, both in figures and from a humanistic perspective of regarding them as fundamental investments in the future of ...
ADINA POPOVICI (BĂRBULESCU)
doaj
Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations
Pediatric Blood &Cancer, EarlyView.ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan +18 more
wiley +1 more source
On linear preservers of two-sided gut-majorization on ${\bf M}_{n,m}$ [PDF]
, 2018 summary:For $X,Y \in {\bf M}_{n,m}$ it is said that $X$ is gut-majorized by $Y$, and we write $ X\prec _{\rm gut} Y$, if there exists an $n$-by-$n$ upper triangular g-row stochastic matrix $R$ such that $X=RY$.
Ilkhanizadeh Manesh, Asma +1 more
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider +15 more
wiley +1 more source