2021, f. 2, tomul LXVII

Grigore Călugăreanu, Horia F. Pop: Are nil-clean 3×3 integral matrices, exchange?, p. 171
N. Saba, S. Boughaba, A. Boussayoud: Symmetric functions of binary products of bivariate complex Lucas polynomials and some special numbers and polynomials, p. 187
Sunil Kumar Chanyal: Slant submanifolds in an almost para contact metric manifold, p. 213
Gamaliel Cerda-Morales: On Gauss third-order Jacobsthal numbers and their applications, p. 231
Salvatore de Candia, Maria Falcitelli: Some reduction theorems for even-dimensional slant submanifolds of a C5+C12-manifold, p. 243
Dorota Brod, Anetta Szynal-Liana, Iwona Wloch: On a new generalization of bihyperbolic Pell numbers, p. 251
M.C.S. Mangueira, R.P.M. Vieira, F.R.V. Alves, P.M.M.C. Catarino: A generalized Perrin polynomial sequence and its two-dimensional recurrences, p. 261
M. K. Sen, S. K. Maity, Sabnam Swomin: Von Neumann regular semimodule, p. 279
Mohammad Ashraf, Mohit Kumar: Extended zero divisor graph on commutative semigroup, p. 295
Parisa Seifizadeh, Mohammad M. Nasrabadi: The holomorph of an extra-special p-group, p. 309
Abdelkarim Boua, Ahmed Y. Abdelwanis, Nadeem ur Rehman: On higher derivations of partially ordered sets, p. 319
I. Pop: Directed approximate fibrations, p. 331