Elementwise vector multiplication

[denkorzh]

Section 5.2 (page 52)

That would be very nice to introduce so-called $\odot$ operation of elementwise multiplication as now formulee like step 9 in Algorithm 3 look informal.

Also the remark about vectorization of activation function g(z) and its derivative is preferable.

[diefimov]

Denis, thank you very much for your comments! I really appreciate it. I am going to review them during the next few days and correct the lectures accordingly.

[denkorzh]

@diefimov Maybe it would be convinient to share the source latex files to make creating pull requests possible

[diefimov]

@denkorzh Let me think about it, probably, it is a good idea to share source latex files on github.