CONTENTS                          Vol. 35, No. 1, 2019

DORIN ANDRICA and OVIDIU BAGDASAR
On some results concerning the polygonal polynomials pp. 01 – 12
ALINA-RAMONA BAIAS, FLORINA BLAGA and DORIAN POPA
Best Ulam constant for a linear difference equation pp. 13 – 22
APIMUK BUAKIRD and SATIT SAEJUNG
Ulam stability with respect to a directed graph for some fixed point equations pp.  23 – 30
BILAL A. CHAT, HILAL A. GANIE and S. PIRZADA
Bounds for the skew Laplacian spectral radius of oriented graphs pp. 31 – 40
HATICE ASLAN HANÇER, MURAT OLGUN and ISHAK ALTUN
Some new types multivalued F-contractions on quasi metric spaces and their fixed points pp. 41 – 50
ADRIAN HOLHOŞ
A sequence of positive linear operators related to powered Baskakov basis pp. 51 – 58
CRISTINA E. HRETCANU and ADARA M. BLAGA
Hemi-slant submanifolds in metallic Riemannian manifolds pp. 59 – 68
CONSTANTIN P. NICULESCU
The Abel-Steffensen inequality in higher dimensions pp.  69 – 78
ALEXANDRU ORZAN
A new class of fractional type set-valued functions pp. 79 – 84
WARUT SAKSIRIKUN, VASILE BERINDE and NARIN PETROT
Coincidence point theorems for cyclic multi-valued and hybrid contractive mappings pp.  85 – 94
RAWEEROTE SUPARATULATORN and SUTHEP SUANTAI
A new hybrid algorithm for global minimization of best proximity points in Hilbert spaces pp. 95 – 102
BOYAN ZLATANOV
Kottman’s constant, packing constant and Riesz angle in some classes of Köthe sequence spaces pp.  103 – 124