منابع مشابه
The Fabulous (11,5, 2) Biplane
After a workshop for new teaching assistants on innovations in teaching, a new sociology graduate student wandered into my office and asked the question, " Tell me. .. how do you make math exciting for students? " By chance, I just happened to have on my computer screen a picture that exhibits some of the symmetries of one of the most intriguing objects in mathematics: the (11, 5, 2) biplane. F...
متن کاملMonoplane versus Biplane
HERE is no question in the development of aviation more interesting to the average observer than the relative value of the biplane and the monoplane. Types of both have so multiplied and differentiated that the man on the street can no longer distinguish at sight, say, a Nieuport from any other of the monoplanes to which Bleriot accustomed him, or pick out a Farman, a Sommer, a Voisin, from oth...
متن کاملGeometric Biplane Graphs II: Graph Augmentation
We study biplane graphs drawn on a finite point set S in the plane in general position. This is the family of geometric graphs whose vertex set is S and which can be decomposed into two plane graphs. We show that every sufficiently large point set admits a 5-connected biplane graph and that there are arbitrarily large point sets that do not admit any 6connected biplane graph. Furthermore, we sh...
متن کاملGeometric Biplane Graphs I: Maximal Graphs
We study biplane graphs drawn on a finite point set S in the plane in general position. This is the family of geometric graphs whose vertex set is S and can be decomposed into two plane graphs. We show that two maximal biplane graphs—in the sense that no edge can be added while staying biplane—may differ in the number of edges, and we provide an efficient algorithm for adding edges to a biplane...
متن کاملAccuracy of distance measurements in biplane angiography
Distance measurements of the vascular system of the brain can be derived from biplanar digital subtraction angiography (2pDSA). The measurements are used for planning of minimal invasive surgical procedures. Our 90°-fixed-angle G-ring angiography system has the potential of acquiring pairs of such images with high geometric accuracy. The sizes of vessels and aneurysms are estimated applying a f...
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ژورنال
عنوان ژورنال: The Iowa Review
سال: 1977
ISSN: 0021-065X,2330-0361
DOI: 10.17077/0021-065x.2204