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v2009.01.01 - Convex Optimization

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2.13. DUAL CONE & GENERALIZED INEQUALITY 177<br />

1<br />

0.8<br />

0.6<br />

K ∗ M+<br />

(a)<br />

0.4<br />

0.2<br />

K M+<br />

0<br />

−0.2<br />

−0.4<br />

−0.6<br />

K ∗ M+<br />

−0.8<br />

−1<br />

−0.5 0 0.5 1 1.5<br />

(b)<br />

⎡<br />

X †T (:,3) = ⎣<br />

0<br />

0<br />

1<br />

⎤<br />

⎦<br />

∂K ∗ M+<br />

K M+<br />

⎡<br />

X = ⎣<br />

1 1 1<br />

0 1 1<br />

0 0 1<br />

⎤<br />

⎦<br />

⎡<br />

1<br />

X †T (:,1) = ⎣−1<br />

0<br />

⎤<br />

⎦<br />

⎡ ⎤<br />

0<br />

X †T (:,2) = ⎣ 1 ⎦<br />

−1<br />

Figure 56: Simplicial cones. (a) Monotone nonnegative cone K M+ and its<br />

dual K ∗ M+ (drawn truncated) in R2 . (b) Monotone nonnegative cone and<br />

boundary of its dual (both drawn truncated) in R 3 . Extreme directions of<br />

K ∗ M+ are indicated.

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