scholarly journals Nemitsky's operators and lower closure theorems

1976 ◽  
Vol 19 (1) ◽  
pp. 165-183 ◽  
Author(s):  
L. Cesari ◽  
M. B. Suryanarayana
Symmetry ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1035
Author(s):  
Cai-Mei Yan ◽  
Rekha Srivastava ◽  
Jin-Lin Liu

A new subclass Σp,q(α,A,B) of meromorphic multivalent functions is defined by means of a q-difference operator. Some properties of the functions in this new subclass, such as sufficient and necessary conditions, coefficient estimates, growth and distortion theorems, radius of starlikeness and convexity, partial sums and closure theorems, are investigated.


Langmuir ◽  
2007 ◽  
Vol 23 (22) ◽  
pp. 11021-11026 ◽  
Author(s):  
Kunimitsu Morishige ◽  
Mayumi Ishino

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