ROMANIAN ACADEMY
MATHEMATICAL REPORTS
VOL. 21(71) No. 1 2019
CONTENTS
Niat NIGAR, Constantin FETECAU and Shehraz AKHTAR
General solutions for the axial Couette flow of rate type fluids in cylindrical domains
Bijan Kumar PATEL and Prasanta Kumar RAY
On the properties of (
p, q
)-Fibonacci and (
p, q
)-Lucas quaternions
Takao KOMATSU and Rusen LI
Convolution identities for Tribonacci numbers with symmetric formulae
Jafar A'ZAMI and Maryam KHAJEPOUR
Topics in prime submodules and other aspects of the prime avoidance theorem
Bao Quoc TA and Chung Pham VAN
A probabilistic proof of Euler's formula for ζ(2
n
)
Gözde ÖZKAN TÜKEL and Ahmet YÜCESAN
Elastic strips with timelike directrix
Ismail NIKOUFAR and Moosa SHAMOHAMMADI
Multivariate perspectives
Shaohui WANG, Wei GAO, Muhammad K. JAMIL, Mohammad R. FARAHANI and Jia-Bao LIU
Bounds of Zagreb indices and hyper Zagreb indices
Bahram DASTOURIAN and Mohammad JANFADA
K
-frames and unitary representations
Huanyin CHEN, Handan KOSE and Yosum KURTULMAZ
Almost unit-clean rings
Aynur ARIKAN
On certain
F
-perfect groups
