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3:19 PM
@C.F.G: Adding a tag for a particular book is discouraged, see e.g. Is it OK to create a tag about exercises from one particular book?. – This is currently discussed in chat, you are welcome to chime in. — Martin R 2 days ago
I have removed the tag from the five questions: math.stackexchange.com/posts/3340272/revisions
 

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