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Taut string algorithm and TV-minimization equivalence

Sorry for digging this up after 3 years, I just stumbled upon the exact same problem. This is by no means a complete answer, just a current state of my own work. I'm sure you saw that Condat poses the ...
lphil's user avatar
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Equivalence of minimizing trace and determinant over matrix quadratic form in multivariate regression

$\newcommand\tr{\operatorname{tr}}$Let $$Q(B):=(Y-XB)^T(Y-XB).$$ Since the column spaces of the matrices $X^TX$ and $X^T$ are the same, there is a matrix $B_*$ such that $$X^TXB_*=X^T Y.$$ For each $z\...
Iosif Pinelis's user avatar

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