2026
On semigroups of orientation-preserving partial permutations with restricted range
De Biao Li 
and Vítor H. Fernandes
Parallel real hypersurfaces in $\mathbb{S}^2\times\mathbb{S}^2$ and $\mathbb{H}^2\times\mathbb{H}^2$ with respect to the $k$-generalized Tanaka—Webster connection
Zejun Hu and Xiaoge Lu
Classification of abelian finite-dimensional $C^*$-algebras by orthogonality
Bojan Kuzma and Sushil Singla
The extendibility of the parametric $D(-1)$-triples
Mirela Jukić Bokun and Ivan Soldo
A note about the discrete Riesz potential on $\mathbb{Z}^n$
Pablo Rocha
Unconditional convergence of general Fourier series
Vakhtang Tsagareishvili, Giorgi Tutberidze and Giorgi Cagareishvili
Pseudo-Ricci—Bourguignon solitons in the complex hyperbolic two-plane Grassmannians
Young Jin Suh and Changhwa Woo
Twisted duality and BV-algebras on the (co)homology of quadratic Poisson structures
Yaxuan Li and Shengqiang Wang
Homological properties of a family of quotients of the Rees algebra
Elahe Nafarieh Talkhooncheh , Maryam Salimi , Hamid Rasouli , Elham Tavasoli and Abolfazl Tehranian
On a conjecture by Pethő concerning absolute values of roots of generalized Fibonacci polynomials
Florian Luca and Diego Marques
Heisenberg double of some quantum group and its representations
Wei Wang , Limeng Xia and Senrong Xu
On the generalized Ramanujan—Nagell equation $D_1x^2-D_2=p^n$
Yasutsugu Fujita and Maohua Le
Finite groups with regular subgroup graph
Andrea Lucchini
In memory of László Kozma (1960-2026)
Csaba Vincze
An optimality condition for linear programs
Mihály Bessenyei and Norbert Tóth
Trudinger-type inequalities for double-phase functionals with variable exponents over metric measure spaces
Takao Ohno and Tetsu Shimomura
Weakly affine functions
Zoltán Boros and Péter Tóth
Measures of noncompactness in Hilbert $C^\ast$-modules
Dragoljub J. Kečkić and Zlatko Lazović
Explicit and mixed estimates for Thue inequalities with few coefficients
N. Saradha and Divyum Sharma
Generalized Randers metrics with special $1$-form
Amr Soleiman and Salah G. Elgendi
Solubility of additive quartic forms over $\mathbb{Q}_2(\sqrt{-5})$
Geovane Matheus Lemes Andrade and Drew Duncan
Some properties of the quadrinomials $p(z)=1+\kappa(z+z^{N-1})+z^N$ and $q(z)=1+\kappa(z-z^{N-1})-z^N$
Dmitriy Dmitrishin and Alexander Stokolos
On non-abelian extensions of Rota—Baxter algebras, dendriform algebras and Wells short exact sequence
Apurba Das and Nishant Rathee
Parallel covering of a square with equilateral triangles
Fengjiao Song and Zhanjun Su
On alienation of the sine and cosine addition formulas on semigroups
Bruce Ebanks
Super-biderivations of the contact Lie superalgebra $K(m,n;\underline{t})$ in prime characteristic
Jingyi Zhang , Jixia Yuan and Liangyun Chen
Asymptotic convergence for a class of fully nonlinear inverse curvature flows in a cone
Ya Gao and Jing Mao
Ribaucour-type hypersurfaces
Milton Javier Cardenas Mendez and Armando Mauro Vasquez Corro
Optimal ball and horoball packings generated by simply truncated Coxeter orthoschemes with parallel faces in hyperbolic $n$-space for $4\leq n\leq 6$
Arnasli Yahya and Jenő Szirmai
Some examples related to squares of elements in rings
Grigore Călugăreanu
Investigations of warped product manifolds admitting $W^{\ast}$-curvature tensor with applications
Uday Chand De , Sameh Shenawy , Abdallah Abdelhameed Syied , Krishnendu De and Nasser Bin Turki
A characterization of the distances between Pisot numbers generating the same number field
Marie José Bertin and Toufik Zaїmi
Generating elements and isometric Galois actions over Tate fields
Victor Alexandru and Marian Vâjâitu
Number of solutions to $a^x+b^y=c^z$ with $\gcd(a,b)>1$
Reese Scott and Robert Styer
On problems of Nathanson related to minimal asymptotic bases
Chang Chen and Min Tang
On the non-existence of left-invariant hypercomplex structures on $SU(2)^{4n}$
David N. Pham
$\Phi$-moment martingale inequalities on variable Lorentz—Karamata spaces
Libo Li , Xiangpeng Qi and Anming Yang
On Diophantine equations involving intersection of Thabit and Williams numbers base $b$ and some ternary recurrent sequences
Bibhu Prasad Tripathy , Asutosh Satapathy , Utkal Keshari Dutta and Bijan Kumar Patel