Yihui "Ray" Ren comments

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                                            Yihui "Ray" Ren

Vim cell commands

Is it possible to "y3y" to yank three cells, and "p" to copy them. (the same goes with "d3d" where 3 is just some arbitrary number)

Failed to parse expression $(( ))

![screen_shot_at_2020-08-01T16:50:11-04:00](https://user-images.githubusercontent.com/2334880/89110274-2cd95b80-d417-11ea-9c37-81ec9b97acbc.png) second this.

get_fields returns None on PDFs saved with PyPDF2

@pubpub-zz Just to add one more data point. `ver=3.7.0`. I experienced the same [issue](https://github.com/py-pdf/pypdf/issues/1268#issuecomment-1226704221). If I create a plain writer `writer = PdfWriter()`, it works. But if I create a...

get_fields returns None on PDFs saved with PyPDF2

> @YHRen thanks for reporting the issue in documentation. Can you propose a PR to update it ? @pubpub-zz Yes, with pleasure!

get_fields returns None on PDFs saved with PyPDF2

@pubpub-zz #1769 please give it a test.

Conjugate operation

not that easy i think. because one has to make sure the backprop works. a conjugate of a function may not be a holomorphic.

Why BCELoss for xy?

add me to the list :D same question here.