# complex analysis related issues & queries in MathXchanger

## Is S is closed in R?

Updated November 22, 2017 15:20 PM

## SVD with Sparsity Penalties

Updated November 22, 2017 10:20 AM

## Do we have $|BA|=B|A|$?

Updated November 22, 2017 07:20 AM

## Why this equality holds?

Updated November 22, 2017 07:20 AM

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