Results 61 to 70 of about 391,009 (282)

Strongly omnipresent operators: general conditions and applications to composition operators [PDF]

, 2002
This paper studies the concept of strongly omnipresent operators that was recently introduced by the first two authors. An operator T on the space H(G) of holomorphic functions on a complex domain G is called strongly omnipresent whenever the set of T ...
Bernal González, Luis, Calderón Moreno, María del Carmen, Grosse-Erdmann, Karl-Goswin   +2 more
core  

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

2-Complex Symmetric Composition Operators on H²

Axioms, 2022
In this paper, we study 2-complex symmetric composition operators with the conjugation J, defined by Jf(z)=(f(z¯))¯, on the Hardy space H2. More precisely, we obtain the necessary and sufficient condition for the composition operator Cϕ to be 2-complex ...
Lian Hu, Songxiao Li, Rong Yang
doaj   +1 more source

The Generalized Star Product and the Factorization of Scattering Matrices on Graphs

, 2000
In this article we continue our analysis of Schr\"odinger operators on arbitrary graphs given as certain Laplace operators. In the present paper we give the proof of the composition rule for the scattering matrices.
Albeverio S., Allard C., Avishai Y., Avron J., Beennakker C. W. J., Büttiker M., Büttiker M., Carlson R., Carreau M., de Bianchi M. Sassoli, Dorokhov O. N., Dorokhov O. N., Dorokhov O. N., Dorokhov O. N., Exner P., Exner P., Faddeev L. D., Gerasimenko N. I., Gerasimenko N. I., Kellendonk J., Kostrykin V., Kostrykin V., Kostrykin V., Kostrykin V., Kostrykin V., Kostrykin V., Kowal D., Kurasov P., Lifshitz I. M., Marchenko A. V., Mello P. A., R. Schrader, Redheffer R., Rozman M. G., Tong B. Y., V. Kostrykin, Šeba P.   +36 more
core   +2 more sources

Composition Operators Belonging to Operator Ideals

Journal of Mathematical Analysis and Applications, 1999
Let \(D\) be the unit disc \(\{z\in\mathbb{C}:|z|< 1\}\) of the complex plane \(\mathbb{C}\), and let \(\mu\) be the normalized Lebesgue measure on \(D\).
openaire   +2 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Non-Weakly Supercyclic Weighted Composition Operators

Abstract and Applied Analysis, 2010
We give sufficient conditions under which a weighted composition operator on a Hilbert space of analytic functions is not weakly supercyclic. Also, we give some necessary and sufficient conditions for hypercyclicity and supercyclicity of weighted ...
Z. Kamali, K. Hedayatian, B. Khani Robati   +2 more
doaj   +1 more source

Composition operators on de Branges-Rovnyak spaces [PDF]

مجلة جامعة النجاح للأبحاث العلوم الطبيعية, 2019
We obtain invariant de Branges--Rovnyak spaces for the composition operator. We also find the images of the composition operators on the de Branges-Rovnyak spaces, for special cases of ...
Ghada Nasser, Abdallah Hakawati, Muath Karaki   +2 more
doaj   +1 more source

Organ‐specific redox imbalances in spinal muscular atrophy mice are partially rescued by SMN antisense oligonucleotides

FEBS Letters, EarlyView.
We identified a systemic, progressive loss of protein S‐glutathionylation—detected by nonreducing western blotting—alongside dysregulation of glutathione‐cycle enzymes in both neuronal and peripheral tissues of Taiwanese SMA mice. These alterations were partially rescued by SMN antisense oligonucleotide therapy, revealing persistent redox imbalance as ...
Sofia Vrettou, Brunhilde Wirth
wiley   +1 more source

Compact Weighted Composition Operators and Multiplication Operators between Hardy Spaces

Abstract and Applied Analysis, 2008
We estimate the essential norm of a compact weighted composition operator 𝑢𝐶𝜑 acting between different Hardy spaces of the unit ball in ℂ𝑁. Also we will discuss a compact multiplication operator between Hardy spaces.
Sei-Ichiro Ueki, Luo Luo
doaj   +1 more source