12.07.2015 Views

v2010.10.26 - Convex Optimization

v2010.10.26 - Convex Optimization

v2010.10.26 - Convex Optimization

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

2.13. DUAL CONE & GENERALIZED INEQUALITY 181(a)K0 ∂K ∗∂K ∗K(b)Figure 62: Two (truncated) views of a polyhedral cone K and its dual in R 3 .Each of four extreme directions from K belongs to a face of dual cone K ∗ .Cone K , shrouded by its dual, is symmetrical about its axis of revolution.Each pair of diametrically opposed extreme directions from K makes a rightangle. An orthant (or any rotation thereof; a simplicial cone) is not theonly selfdual polyhedral cone in three or more dimensions; [20,2.A.21] e.g.,consider an equilateral having five extreme directions. In fact, every selfdualpolyhedral cone in R 3 has an odd number of extreme directions. [22, thm.3]

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!