## Discovering less-known PostgreSQL v12 features

Version 12 of PostgreSQL is not exactly fresh out of the oven, as
the first minor release was already announced. However, I think it’s
fair to say that this version can be still considered fresh for most
users, and surely only a small percentage of users has upgraded. So
I think it makes sense to go over some new features.

Source: Discovering less-known PostgreSQL 12
features,
an article by Kaarel Moppel.

## The Matrix Calculus You Need For Deep Learning

This paper is an attempt to explain all the matrix calculus you need
in order to understand the training of deep neural networks. We
assume no math knowledge beyond what you learned in calculus 1, and
provide links to help you refresh the necessary math where
needed. Note that you do **not** need to understand this material before
you start learning to train and use deep learning in practice;
rather, this material is for those who are already familiar with the
basics of neural networks, and wish to deepen their understanding of
the underlying math.

Source: The matrix calculus you need for deep
learning, an article
by Terence Parr and Jeremy Howard.