scholarly journals On the Best Constant Problem for a Class of Mixed-Norm Hardy Inequalities

2021 ◽  
Vol 172 (1) ◽  
Author(s):  
Baofeng Lai ◽  
Runqiu Wang

AbstractIn this paper, we obtain the best constant and the equality condition for a class of mixed-norm Hardy inequalities when the weight is a power function. By building and solving the corresponding Euler equation, we look for the best constant and the optimal function. One of the main ingredients is to introduce two key auxiliary functions so that the corresponding equalities are derived.

2011 ◽  
Vol 54 (4) ◽  
pp. 630-644 ◽  
Author(s):  
Alberto Fiorenza ◽  
Babita Gupta ◽  
Pankaj Jain

AbstractHigher dimensional mixed norm type inequalities involving certain integral operators are characterized in terms of the corresponding lower dimensional inequalities.


2003 ◽  
Vol 05 (06) ◽  
pp. 869-881 ◽  
Author(s):  
G. BARBATIS ◽  
S. FILIPPAS ◽  
A. TERTIKAS

For a bounded convex domain Ω in RN we prove refined Hardy inequalities that involve the Hardy potential corresponding to the distance to the boundary of Ω, the volume of Ω, as well as a finite number of sharp logarithmic corrections. We also discuss the best constant of these inequalities.


Author(s):  
B. J. Panessa ◽  
H. W. Kraner ◽  
J. B. Warren ◽  
K. W. Jones

During photoexcitation the retina requires specific electrolytes and trace metals for optimal function (Na, Mg, Cl, K, Ca, S, P, Cu and Zn). According to Hagins (1981), photoexcitation and generation of a nerve impulse involves the movement of Ca from the rhodopsin-ladened membranes of the rod outer segment (ROS) to the plasmalemma, which in turn decreases the in-flow of Na into the photoreceptor, resulting in hyperpolarization. In toad isolated retinas, the presence of Ba has been found to increase the amplitude and prolong the delay of the light response (Brown and Flaming, 1978). Trace metals such as Cu, Zn and Se are essential for the activity of the metalloenzymes of the retina and retina pigment epithelium (RPE) (i.e. carbonic anhydrase, retinol dehydrogenase, tyrosinase, glutathione peroxidase, superoxide dismutase...). Therefore the content and fluctuations of these elements in the retina and choroid are of fundamental importance for the maintenance of vision. This paper presents elemental data from light and dark adapted frog ocular tissues examined by electron beam induced x-ray microanalysis, x-ray fluorescence spectrometry (XRF) and proton induced x-ray emission spectrometry (PIXE).


Author(s):  
Nicholas C. Oleck ◽  
Radhika Malhotra ◽  
Haripriya S. Ayyala ◽  
Ramazi O. Datiashvili

AbstractMajor limb replantation is a formidable task, especially in the pediatric setting. While meticulous microsurgical technique is required in the operating room, the authors aim to highlight the importance of postoperative rehabilitation therapy for optimal function. We highlight the case of a 12-year-old boy who suffered complete traumatic amputation through the distal left forearm. The limb was successfully replanted with successful restoration of sensation and function with the aid of intensive postoperative occupational therapy. A multidisciplinary team is of paramount importance to maximize function of a replanted upper extremity.


AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 411-417
Author(s):  
Mark Drela ◽  
Ali Merchant ◽  
Jaime Peraire
Keyword(s):  

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