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For x,y > 0 , a,b ∈ R with a + b = 0 , the generalized Muirhead mean is defined by M(a,b;x,y) = x a y b +x b y a 2 1 a+b. In this paper, we prove that M(a,b;x,y) is Schur convex with respect to (x,y) ∈ (0,∞)×(0,∞) if and only if (a,b) ∈ {(a,b) ∈ R 2 : (a−b) 2 a+b > 0 & ab 0} and Schur concave with respect to (x,y) ∈ (0,∞)×(0,∞) if and only if (a,b) ∈ {(a,b)(More)
OBJECT Chronic mechanical compression of the spinal cord, which is commonly caused by degeneration of the spine, impairs motor and sensory functions insidiously and progressively. Yet the exact mechanisms of chronic spinal cord compression (SCC) remain to be elucidated. To study the pathophysiology of this condition, the authors developed a simple animal(More)
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