67 citations
- Zhejiang UniversityCN3 papers
- Baise UniversityCN2 papers
- Nanjing UniversityCN2 papers
- University of Science and Technology of ChinaCN2 papers
- Beihang UniversityCN1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
- East Texas A&M UniversityUS1 paper
- Guangxi UniversityCN1 paper
- Guangzhou UniversityCN1 paper
- Jagiellonian UniversityPL1 paper
- Kavli Institute for Theoretical SciencesCN1 paper
- National University of SingaporeSG1 paper
15 papers
Evidence for the connection between star formation rate and evolutionary phases of quasars
Zhifu Chen, Zhicheng He, Luis C. Ho +5
Both theory and observations suggest that outflows driven by an active central supermassive black hole (SMBH) has a feedback effect on shaping the global properties of the host gal…
The detections of inflowing gas from narrow absorption lines at the parsec scale
Zhi-Fu Chen, Minfeng Gu, Zhicheng He +4
Inflows at the dusty torus and smaller scales is crucial to investigate the process of supermassive black hole accretion. However, only few cases of inflowing gas at small scales h…
A Condition for Multiplicity Structure of Univariate Polynomials
Hoon Hong, Jing Yang
We consider the problem of finding a condition for a univariate polynomial having a given multiplicity structure when the number of distinct roots is given. It is well known that s…
The core inverse and constrained matrix approximation problem
Hongxing Wang, Xiaoyan Zhang
In this paper,we study the constrained matrix approximation problem in the Frobenius norm by using the core inverse:\begin{align}\nonumber \left\|{Mx - b} \right\|_F=\min\ \ {\rm s…
Convergence of a Time Discretization for Nonlinear Second Order Inclusion
Krzysztof Bartosz, Leszek Gasiński, Zhenhai Liu +1
We study an abstract second order inclusion involving two nonlinear single-valued operators and a nonlinear multivalued term. Our goal is to establish the existence of solutions to…
The correlated variations of C IV narrow absorption lines and quasar continuum
Zhi-Fu Chen, Ting-Ting Pang, Bing He +1
We assemble 207 variable quasars from the Sloan Digital Sky Survey, all with at least 3 observations, to analyze C IV narrow absorption doublets, and obtain 328 C IV narrow absorpt…