5. LADW #5.1.9: Recall the p-norms and max-norm, defined on R2 by: ||x||p = (|x₁|P+|x₂|P)¹/p ||X||∞ = = max{x1, x₂]} We then define the "unit ball" Bp in the norm ||- ||p to be Bp = {x € R² : ||x||p ≤ 1}. For example, for p = 1, we have B₁ = {x € R² : ||x||1 ≤ 1} = {(x, y) = R² : |x| + |y| ≤ 1} :

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
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Chapter10: Sequences, Series, And Probability
Section10.7: Distinguishable Permutations And Combinations
Problem 29E
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5. LADW #5.1.9: Recall the p-norms and max-norm, defined on R² by:
||x||p = (|x₁|² + |x₂|P)¹/p
||x|| = max{|x₁|, |x₂|}
We then define the "unit ball" Bp in the norm ||- ||p to be
Bp = {x € R² : ||x||p ≤ 1}.
For example, for p = 1, we have B₁ = {x € R² : ||x||1 ≤ 1} = {(x, y) = R² : [x] + [y] ≤ 1} :
0:5
-0.5 0
-0.5-
0.5
Note that B₁ looks like this because |x| + |y| ≤ 1 is equivalent (on the proper domains) to all
four inequalities y ≤ -x+1 (orange), y ≤ x+1 (purple), y ≥ x− 1 (green), and y ≥ −x−1
(black).
For p = 2 and p = ∞, draw the unit ball Bp in the norm ||· ||p.
Transcribed Image Text:5. LADW #5.1.9: Recall the p-norms and max-norm, defined on R² by: ||x||p = (|x₁|² + |x₂|P)¹/p ||x|| = max{|x₁|, |x₂|} We then define the "unit ball" Bp in the norm ||- ||p to be Bp = {x € R² : ||x||p ≤ 1}. For example, for p = 1, we have B₁ = {x € R² : ||x||1 ≤ 1} = {(x, y) = R² : [x] + [y] ≤ 1} : 0:5 -0.5 0 -0.5- 0.5 Note that B₁ looks like this because |x| + |y| ≤ 1 is equivalent (on the proper domains) to all four inequalities y ≤ -x+1 (orange), y ≤ x+1 (purple), y ≥ x− 1 (green), and y ≥ −x−1 (black). For p = 2 and p = ∞, draw the unit ball Bp in the norm ||· ||p.
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