CONTENTS           Vol. 37, No. 1, 2021

MONTHER R. ALFURAIDAN, SELVARAJ BALACHANDRAN and TOMAS VETRIK
General multiplicative Zagreb indices of unicyclic graphs      1 – 11

SULIMAN AL-HOMIDAN
Semi–definite programming for the nearest circulant semi–definite matrix problem     13 – 22

CAMELIA BARBATU and DANIEL BREAZ
Univalence criteria for a general integral operator      23 – 33

DAVID BENKO, DAN COROIAN and LIA PETRACOVICI
A fresh look at Cauchy’s Convergence Criterion: Some variations and generalizations     35 – 43

ROVANA BORUGA (TOMA) and MIHAIL MEGAN
Datko type characterizations for non uniform polynomial dichotomy        45-51

DUMITRU BUSNEAG, DANA PICIU and ANCA-MARIA DINA
Ideals in residuated lattices            53 – 63

K. CALDERON, M. A. KHAMSI and J. MARTINEZ-MORENO
Perturbed approximations of fixed points of nonexpansive mappings in CATp(0) spaces     65 – 79

NURSEL CETIN
A new complex generalized Bernstein-Schurer operator     81 – 89

R. DURAN DIAZ, L. HERNANDEZ ENCINAS and J. MUNOZ MASQUE
Quadratic maps in two variables on arbitrary fields                    91 – 100

CRISTIAN DINU, DANIELA DANCIULESCU and ALEXANDRU TUGUI
Some inequalities related to Ky Fan inequality on time scales  101-108

RABIA SAVAS and RICHARD F. PATTERSON
Gauge strongly summability of measurable functions          109 – 117

MIHAI TALMACIU
On Hyper-Chordal graphs         119 – 126

CLAUDIA VALLS
Universal centers and composition conditions on the complex plane    127 – 133

YI-BIN XIAO and MIRCEA SOFONEA
Tykhonov triples, well-posedness and convergence results       135 – 143