wording on page 128

[sophoi]

Describe the mistake A phrase on page 128 needs minor editing, so the reader can easily understand it.

Location Please provide the

1. version: online PDF Draft (2021-01-14)
2. Chapter 4
3. page 128
4. in the last paragraph of the gray box, the phrase after the dash: ... so a science fiction lover v1 gives a rating of zero to everything but science fiction themed – this logic is implied the diagonal substructure for the singular value matrix Σ.

Proposed solution Change it to (add "in" and change "for" to "of"): – this logic is implied in the diagonal substructure of the singular value matrix Σ.

Additional context When I first read this part, I had to read it several times to guess the meaning of it

[mpd37]

Thanks for catching this. I added the word "by", so that it reads now

An idealized science fiction lover is a purist and only loves science fiction movies, so a science fiction lover v1 gives a rating of zero to everything but science fiction themed---this logic is implied by the diagonal substructure for the singular value matrix Sigma.