منابع مشابه
Discrete Hashimoto surfaces and a doubly discrete smoke ring flow
Bäcklund transformations for smooth and “space discrete” Hashimoto surfaces are discussed and a geometric interpretation is given. It is shown that the complex curvature of a discrete space curve evolves with the discrete nonlinear Schrödinger equation (NLSE) of Ablowitz and Ladik, when the curve evolves with the Hashimoto or smoke ring flow. A doubly discrete Hashimoto flow is derived and it i...
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Immunity from such infections may be natural or may be acquired. By natural immunity we understand a natural resistance to infection by certain micro-organisms which are known to have pathogenic properties for other species of animals. It is know, for instance, that microbes which produce a rapidly fatal disease in one kind of animal are quite innocuous when introduced even in enormous numbers ...
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ژورنال
عنوان ژورنال: Science
سال: 1886
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-8.179.36