Volume 18

Issue 1

3/2024

Hang Zhou

Hyponormality of specific unbounded product of densely defined composition operators in L² spaces

18-01 Pages 1-22

Abstract Article page

Yuqiu Sheng, Wende Liu, Xingxue Miao

Lie superalgebras based on 𝔰𝔩(2,𝔽)

18-02 Pages 23-36

Abstract Article page

Johanns de Andrade Bezerra

Remarks on the product of two projections

18-03 Pages 37-52

Abstract Article page

Jian-Zhong Xiao, Feng-Qin Zhu

The Aleksandrov problem and the Tingley problem for expansive and nonexpansive operators in p-normed spaces

18-04 Pages 53-67

Abstract Article page

Saeedatossadat Nourbakhsh, Mahmoud Hassani, Mohsen Erfanian Omidvar, Hamid Reza Moradi

Inner product inequalities through Cartesian decomposition with applications to numerical radius inequalities

18-05 Pages 69-81

Abstract Article page

Messaoud Guesba, Pintu Bhunia, Kallol Paul

Berezin number inequalities via positivity of 2 × 2 block matrices

18-06 Pages 83-95

Abstract Article page

R. Balaji, Vinayak Gupta

On distance Laplacian matrices of weighted trees

18-07 Pages 97-114

Abstract Article page

Zuowei Zhang, Xia Zhao

The inheritance of m-comparison from the containing C*-algebra to a large subalgebra

18-08 Pages 115-127

Abstract Article page

Messaoud Guesba, Mohammad Sababheh

On the Berezin number of operator matrices

18-09 Pages 129-146

Abstract Article page

Anuradha Gupta, Amita Aggarwal

Hyponormality of the sum of Toeplitz operators with non-harmonic symbol on the Fock space

18-10 Pages 147-162

Abstract Article page

Wenhua Qian, Dandan Xiao, Tanghong Tao, Wenming Wu, Xin Yi

Joint spectrum shrinking maps on projections

18-11 Pages 163-172

Abstract Article page

Huanyin Chen, Marjan Sheibani Abdolyousefi

Generalized core inverse in Banach ∗-algebras

18-12 Pages 173-189

Abstract Article page

Albrecht Seelmann

Relative residual bounds for eigenvalues in gaps of the essential spectrum

18-13 Pages 191-203

Abstract Article page

Debendra P. Banjade, Amy Chambers, Menassie Ephrem

On singularities of labeled graph C^*-algebras

18-14 Pages 205-234

Abstract Article page

Vali M. Kurbanov, Elchin J. Ibadov

On the properties of the systems of root vector functions of Dirac-type operator with summable potential

18-15 Pages 235-256

Abstract Article page

Mohammad Sababheh, Ibrahim Halil Gümüş, Hamid Reza Moradi

Further properties of PPT and (α,β)-normal matrices

18-16 Pages 257-271

Abstract Article page

Issue 2

6/2024

Yang Liu

On minimal smallest singular value of subframes for signal recovery

18-17 Pages 273-293

Abstract Article page

M. Khokulan, K. Thirulogasanthar

Perturbation of continuous frames on quaternionic Hilbert spaces

18-18 Pages 295-317

Abstract Article page

Xiuwen Yang, Ligong Wang, Weige Xi

On the A_α spectral radius and A_α energy of non-strongly connected digraphs

18-19 Pages 319-333

Abstract Article page

Yanling Mao, Guoxing Ji

On Ando-Hiai type inequalities for sectorial matrices

18-20 Pages 335-342

Abstract Article page

Arnab Patra, Falguni Roy

On the estimation of q-numerical radius of Hilbert space operators

18-21 Pages 343-359

Abstract Article page

H. Ardakani, Kh. Amjadi

Positively limited p-convergent and weak^* positively p-convergent operators

18-22 Pages 361-374

Abstract Article page

Mohamed Chraibi Kaadoud, Somayya Moulaharabbi

q-numerical radius inequalities for product of complex linear bounded operators

18-23 Pages 375-388

Abstract Article page

Ezzine Faten, Mohamed Ali Hammami, Walid Hdidi

Stability analysis of time--invariant perturbed singular systems

18-24 Pages 389-407

Abstract Article page

Hamid Nkhaylia

Multiplicatively numerical range-preserving maps

18-25 Pages 409-426

Abstract Article page

Eungil Ko, Yoonkyeong Lee

The operator equation AXB=X and the Fuglede-Putnam type property

18-26 Pages 427-440

Abstract Article page

Ulaş Yamancı, Messaoud Guesba, Duygu Uslu

Some novel inequalities for Berezin number of operators

18-27 Pages 441-455

Abstract Article page

Benjamin Cahen

Complex Weyl symbols of the extended metaplectic representation operators

18-28 Pages 457-477

Abstract Article page

Sasmita Patnaik, Sanehlata, Gary Weiss

Singly generated selfadjoint-ideal operator semigroups: spectral density of the generator and simplicity

18-29 Pages 479-522

Abstract Article page

Issue 3

9/2024

Himadri Lal Das

Dense subset of matrices having eigenvalues and singular values with minimum number of repetition

18-30 Pages 523-533

Abstract Article page

Rytis Juršėnas

The peak model for finite rank supersingular perturbations

18-31 Pages 535-557

Abstract Article page

Behrooz Fadaee, Hoger Ghahramani

On Lie triple centralizers of von Neumann algebras

18-32 Pages 559-570

Abstract Article page

Pabitra Kumar Jena, Badal Sahoo

Core inverse of operators in Hilbert spaces

18-33 Pages 571-582

Abstract Article page

Changjing Li, Xiaoyi Li, Jingxuan Wang

Nonlinear skew Lie type higher derivations on some operator algebras

18-34 Pages 583-602

Abstract Article page

Fen Wang

An elementary proof of a Hlawka type inequality

18-35 Pages 603-610

Abstract Article page

R. Balaji, Gargi Lather, Hiroshi Kurata, Vinayak Gupta

A special property of resistance matrices

18-36 Pages 611-621

Abstract Article page

Liyi Zheng, Yaoping Zhao, Xin Zou, Zhongxun Zhu

The spectral radii on uniform tricyclic hypergraphs

18-37 Pages 623-640

Abstract Article page

Thomas Kappeler, Jürg Kramer

On number theoretic properties of the KdV frequencies

18-38 Pages 641-663

Abstract Article page

Jiming Shen, Yixin Yang

The complete Nevanlinna-Pick property for Beurling type quotient modules over the bidisk

18-39 Pages 665-676

Abstract Article page

Muqile Gao, Deyu Wu, Alatancang Chen

Bounds for the eigenvalues of non-monic operator polynomials

18-40 Pages 677-691

Abstract Article page

Emre Taştüner, Murat Hayrettin Yurdakul

Continuity between some special Köthe spaces

18-41 Pages 693-696

Abstract Article page

Dušica Dmitrović

Norm of composition operator on mixed norm spaces

18-42 Pages 697-710

Abstract Article page

Akira Yamada

Oppenheim-Schur's inequality and RKHS

18-43 Pages 711-733

Abstract Article page

Panchugopal Bikram, Diptesh Saha

Weighted subsequential ergodic theorems on Orlicz spaces

18-44 Pages 735-751

Abstract Article page

Elena Rubei

Maximal dimension of affine subspaces of specific matrices

18-45 Pages 753-761

Abstract Article page

Zhidong Huang, Yousef Estaremi, Saeedeh Shamsigamchi

Quasi-normal and quasi-isometry WCT operators and their algebras

18-46 Pages 763-775

Abstract Article page

Issue 4

12/2024

Mohammed Babahmed

Hypercyclicity criteria on non-archimedean Banach spaces of countable type

18-47 Pages 777-788

Abstract Article page

Mohammad H. M. Rashid, Atsushi Uchiyama

Several properties of the spectrum and local spectrum of class A_n operators

18-48 Pages 789-803

Abstract Article page

Jyoti Rani, Arnab Patra, P. D. Srivastava

Spectrum and fine spectrum of band matrices generated by oscillatory sequences

18-49 Pages 805-831

Abstract Article page

Qinggang Bu, Ying Yao

Reducing subspaces of skew symmetric operators

18-50 Pages 833-843

Abstract Article page

Xiaoxue Han, Fu Sun

Eigenvalues of indefinite q-Sturm-Liouville problem with q-coupled boundary condition

18-51 Pages 845-853

Abstract Article page

Tran Dinh Phung, Nguyen Ngoc Hue, Duong Quoc Huy

Multiple-term refinements for upper bound of the Hermite-Hadamard inequality and applications

18-52 Pages 855-879

Abstract Article page

Feng Zhang, Hefang Jing

Further inequalities for normal matrices

18-53 Pages 881-889

Abstract Article page

Bojan Kuzma, Mitja Mastnak, Matjaž Omladič, Heydar Radjavi

On approximate and actual reducibility of matrix groups

18-54 Pages 891-910

Abstract Article page

Hamzeh Bagherinejad, Rohollah Parvinianzadeh, Ali Iloon Kashkooly

Maps preserving the local spectral subspace of skew-product of operators

18-55 Pages 911-923

Abstract Article page

Suvendu Jana, Pintu Bhunia, Kallol Paul

Euclidean operator radius and numerical radius inequalities

18-56 Pages 925-939

Abstract Article page

Hatem Mejjaoli

Uncertainty principles for the Whittaker Wigner transform

18-57 Pages 941-966

Abstract Article page

Jiaxin Cui, Xiaoling Ma

Distance Laplacian eigenvalue distribution of a graph with given some parameters

18-58 Pages 967-976

Abstract Article page