منابع مشابه
Algebra Notes: Gilbert&Gilbert
Sets and Intervals • An interval with round brackets such as (a, b) means all the numbers between a and b not including a and b. We call this interval an open interval. • An interval with square brackets such as [a, b] means all the numbers between a and b including a and b. We call this interval a closed interval. • An interval with one square bracket and one closed bracket is called a clopen ...
متن کاملThe Gilbert arborescence problem
We investigate the problem of designing a minimum-cost flow network interconnecting n sources and a single sink, each with known locations in a normed space and with associated flow demands. The network may contain any finite number of additional unprescribed nodes from the space; these are known as the Steiner points. For concave increasing cost functions, a minimum cost network of this sort h...
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S ome vertebrates, such as fi sh, amphibians, and lizards, have the ability to replace lost limbs and regenerate organs. Regeneration requires the reactivation of signaling molecules that were used during embryonic development. Weidinger has spent his career so far studying aspects of zebrafish embryogenesis, including the role of Wnt signaling molecules (1, 2), and has more recently been inves...
متن کاملPseudo-Gilbert-Steiner trees
The Gilbert network problem is a generalization of the Steiner minimal tree problem derived by adding flow-dependent weights to the edges. In this paper, we define a special class of minimum Gilbert networks, called pseudo-Gilbert–Steiner trees, and we show that it can be constructed by Gilbert’s generalization of Melzak’s method. Besides, a counterexample, a pseudo-Gilbert–Steiner tree, is con...
متن کاملGilbert and Sullivan
LADIES AND GENTLEMEN,-For upwards of forty years I have lived the busy life of a general practitioner attached to a small hospital in a provincial town. This demanded all my attention and most of my energies, but somehow within the last few years, I have been pitchforked into the arena of medical politics, and in that field great honours have been bestowed upon me. The very greatest of these -t...
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ژورنال
عنوان ژورنال: Anaesthesia and Intensive Care
سال: 1973
ISSN: 0310-057X,1448-0271
DOI: 10.1177/0310057x7300100412