Home Neuroscience. Graduate student Guang Yao left and Xudong Wang right hold a small implantable device that helped rats lose 40 percent of their body weights. More information: Guang Yao et al.
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Effective weight control via an implanted self-powered vagus nerve stimulation device, Nature Communications DOI: Provided by University of Wisconsin-Madison. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Leukemia drug shows promise for treating a childhood brain cancer Sep 20, Sep 20, Related Stories. US approves new weight-loss device for obese people Jan 14, Oct 24, Jun 13, Nerve stimulation in mice suggests new way to reduce delirium after surgery Oct 11, Jul 28, Recommended for you.
Tiny implantable device short-circuits hunger pangs, aids weight loss
Neurons promote growth of brain tumor cells Sep 20, Neurological signals from the spinal cord surprise scientists Sep 19, Sep 19, User comments. Dec 17, Could this be implanted in the bladder to help patients suffering from nerve damage following prostate surgery? Report Block. Sign in. Schwarz see . Various versions of the Schwarz lemma are known. For instance, the following invariant form of the Schwarz lemma: If a function is holomorphic in the disc and if in , then for any points ,.
Equality holds in 2 and 3 only if is a biholomorphic mapping of onto itself. Inequality 3 is also called the differential form of the Schwarz lemma. Integrating this inequality leads to the following formulation of the Schwarz lemma: If the disc is transformed by a holomorphic function such that for , then the hyperbolic length of an arbitrary arc in decreases, except in the case when is a univalent conformal mapping of onto itself; in this case hyperbolic distances between points are preserved.
The principle of the hyperbolic metric cf. Hyperbolic metric, principle of the is a generalization of the invariant form of the Schwarz lemma to multiply-connected domains on which a hyperbolic metric can be defined.
Analogues of the Schwarz lemma for holomorphic mappings in the -dimensional complex space are known see . Schwarz  stated this result for univalent functions only.
ignamant.cl/wp-includes/1/4467-como-ubicar.php The formulation, designation and systematic use of this lemma in the general form stated above is due to C. For the history of this result, see [a3] , pp.
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- The Schwarz Lemma: Rigidity and Dynamics.
The inequalities 2 and 3 are also known as the Schwarz—Pick lemma. Equality 2 can be written in the equivalent form. The Schwarz—Ahlfors—Pick theorem provides an analogous theorem for hyperbolic manifolds.
De Branges' theorem , formerly known as the Bieberbach Conjecture, is an important extension of the lemma, giving restrictions on the higher derivatives of f at 0 in case f is injective ; that is, univalent. From Wikipedia, the free encyclopedia. Gilman, Irwin Kra, Rubi E. New York: Springer.
Categories : Riemann surfaces Lemmas Theorems in complex analysis. Hidden categories: Wikipedia articles incorporating text from PlanetMath Articles containing proofs. Namespaces Article Talk.