Published: 2021-12-23

Article

The algebra generated by nilpotent elements in a matrix centralizer

Ralph John de la Cruz, Eloise Misa

1-8

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Families of graphs with twin pendent paths and the Braess edge

Sooyeong Kim

9-31

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A note on the boundary of the Birkhoff-James ε-orthogonality sets

Georgios Katsouleas, Vasiliki Panagakou, Panayiotis Psarrakos

32-48

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Real dimension of the Lie algebra of S-skew-Hermitian matrices

Jonathan Caalim, Yu-ichi Tanaka

49-62

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Sign patterns of rational matrices with large rank II

Yaroslav Shitov

63-64

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Remarks on "Comparison between the Laplacian energy-like invariant and the Kirchhoff index''

Xiaodan Chen, Guoliang Hao

65-76

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Upper bounds on the algebraic connectivity of graphs

Zhen Lin, Lianying Miao

77-84

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Positivity of Hadamard powers of a few band matrices

Veer Singh Panwar, A. Satyanarayana Reddy

85-90

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On the structure of isometrically embeddable metric spaces

Kathleen Nowak, Carlos Ortiz Marrero, Stephen Young

91-106

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The Gau-Wang-Wu conjecture on partial isometries holds in the 5-by-5 case

Ilya Spitkovsky, Ibrahim Suleiman, Elias Wegert

107-113

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Kronecker products of Perron similarities

Janelle M. Dockter, Pietro Paparella, Robert L. Perry, Jonathan D. Ta

114-122

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On decompositions of matrices into products of commutators of involutions

Tran Nam Son, Truong Huu Dung, Nguyen Thi Thai Ha, Mai Hoang Bien

123-130

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Sign patterns associated with some graphs that allow or require diagonalizability

Sunil Das

131-159

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Linear systems of Diophantine equations

Fernando Szechtman

160-169

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Spectral Slater index of tournaments

Abderrahim Boussaïri, Abdelhak Chaïchaâ, Brahim Chergui, Sara Ezzahir, Soufiane Lakhlifi, Soukaïna Mahzoum

170-178

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Majorization inequalities via convex functions

Mohsen Kian, Mohammad Sababheh

179-194

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A note on semiscalar equivalence of polynomial matrices

Volodymyr M. Prokip

195-203

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Group inverses of matrices associated with certain graph classes

Judith McDonald, Raju Nandi, K. C. Sivakumar

204-220

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A norm inequality for three matrices

Lajos László

221-226

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On the eigenvalues of matrices with common Gershgorin regions

Anna Davis, Paul Zachlin

227-253

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On the non-backtracking spectral radius of graphs

Hongying Lin, Bo Zhou

254-265

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On the banded Toeplitz structured distance to symmetric positive semidefiniteness

Silvia Noschese, Lothar Reichel

266-279

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Constructions of cospectral graphs with different zero forcing numbers

Aida Abiad, Boris Brimkov, Jane Breen, Thomas R. Cameron, Himanshu Gupta, Ralihe R. Villagran

280-294

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Banach spaces of GLT sequences and function spaces

V. B. Kiran Kumar, Rahul Rajan, N. S. Sarathkumar

295-316

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Linear maps preserving the Lorentz spectrum: the $2 \times 2$ case

María I. Bueno, Susana Furtado, Aelita Klausmeier, Joey Veltri

317-330

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Spectral upper bound on the quantum $k$-independence number of a graph

Pawel Wocjan, Clive Elphick, Aida Abiad

331-338

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K-subdirect sums of Nekrasov matrices

Zhen-Hua Lyu, Xueru Wang, Lishu Wen

339-346

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Positive linear maps and spreads of normal matrices

Rajesh Sharma, Manish Pal

347-356

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Trees with maximum sum of the two largest Laplacian eigenvalues

Yirong Zheng, Jianxi Li, Sarula Chang

357-366

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Bounds via spectral radius-preserving row sum expansions

Joseph P. Stover

367-376

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Spectral properties of certain sequences of products of two real matrices

Michela Brundu, Marino Zennaro

377-403

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Compatibility and companions for Leonard pairs

Kazumasa Nomura, Paul Terwilliger

404-456

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On m-th roots of complex matrices

Heguo Liu, Jing Zhao

457-462

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The products of involutions in a matrix centralizer

Ralph John de la Cruz, Raymond Louis Tañedo

463-482

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A note on bounds for eigenvalues of nonsingular H-tensors

Jun He, Guanjun Xu

483-485

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Jordan chains of h-cyclic matrices, II

Andrew Nickerson, Pietro Paparella

486-493

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Strong cospectrality and twin vertices in weighted graphs

Hermie Monterde

494-518

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Unicyclic 3-colored digraphs with bicyclic inverses

Debajit Kalita, Kuldeep Sarma

519-530

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Stratifications of the ray space of a tropical quadratic form by Cauchy-Schwartz functions

Zur Izhakian, Manfred Knebusch

531-558

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A Sylvester-Kac matrix type and the Laplacian controllability of half graphs

Milica Andelic, Carlos M. da Fonseca, Emrah Kilic, Zoran Stanic

559-571

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The Hamiltonian extended Krylov subspace method

Peter Benner, Heike Faßbender, Michel-Niklas Senn

572-606

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Symplectic eigenvalues of positive-semidefinite matrices and the trace minimization theorem

Nguyen Thanh Son, Tatjana Stykel

607-616

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Group inverses of matrices of directed trees

R. Nandi, K. C. Sivakumar

617-631

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W-weighted GDMP inverse for rectangular matrices

Amit Kumar, Vaibhav Shekhar, Debasisha Mishra

632-654

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Sums of orthogonal, symmetric, and skew-symmetric matrices

Ralph John de la Cruz, Agnes T. Paras

655-660

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Inverse eigenvalue and related problems for hollow matrices described by graphs

F. Scott Dahlgren, Zachary Gershkoff, Leslie Hogben, Sara Motlaghian, Derek Young

661-679

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On the Ky Fan $k$-norm of the $LI$-matrix of graphs

Zhen Lin, Lianying Miao, Guanglong Yu, Han Sheng

680-696

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Recovering the characteristic polynomial of a graph from entries of the adjugate matrix

Alexander Farrugia

697-711

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A novel, blocked algorithm for the reduction to Hessenberg-triangular form

Thijs Steel, Raf Vandebril

712-728

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New results on $M$-matrices, $H$-matrices and their inverse classes

Samir Mondal, K. C. Sivakumar, Michael Tsatsomeros

729-744

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An improved algorithm for solving an inverse eigenvalue problem for band matrices

Kanae Akaiwa, Akira Yoshida, Koichi Kondo

745-759

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Birkhoff-James orthogonality in the trace norm, with applications to quantum resource theories

Nathaniel Johnston, Shirin Moein, Rajesh Pereira, Sarah Plosker

760-776

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Accurate computations with totally positive matrices applied to the computation of Gaussian quadrature formulae

Ana Marco, José-Javier Martínez, Raquel Viaña

777-791

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On positive and positive partial transpose matrices

Ibrahim Gumus, Hamid Moradi, Mohammad Sababheh

792-802

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On eigenvalues of real symmetric interval matrices: Sharp bounds and disjointness

Gábor Zoltan Faragó, Robert Vajda

803-819

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Extending CSR decomposition to tropical inhomogeneous matrix products

Arthur Kennedy-Cochran-Patrick, Sergei Sergeev

820-851

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