8 Questions
What problem is the (L,S)-compatibility constant the solution of?
Lasso approximation problem
What does Lemma 6.21 not provide explicit lower bounds for?
Compatibility constant
What kind of matrix is Σ1,1 in the context of the text?
Symmetric matrix
What problem does Lemma 6.22 address?
Eigenvalue problem
What is the problem equivalent to minimizing?
bTΣ1,1b+2λkbk1
What is the value of λ based on the given conditions?
-bTΣ1,1b
What can be replaced by its `2-bound √skβSk2?
kβSk1
What is the (L,S,s)-restricted eigenvalue of Σ defined as?
(L,S,s)-restricted eigenvalue of Σ is not defined
Explore the concepts related to Lemma 6.21 and its connection to the Lasso problem. Understand the difficulty in finding the compatibility constant and its relationship with the Lasso approximation.
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