I'm using amsbook to write a report. I'm using \chapter{}s and \section{}s, and their numbering is fine. However, \section{}s are numbered sequentially inside each \chapter{}, but without the indication of the \chapter{}: basically, I'm getting Section 1 instead of 1.1, and similarly Subsection 1 instead of 1.1.1.

How do I go about fixing this?


Write the following in the preamble:

  • 1
    Instead of posting a “Thank you” as a comment, you should thank by upvoting the answer (with the upward pointing arrow to the left of it) and accepting it (by clicking on the checkmark).
    – egreg
    Jun 15 '11 at 15:31

alternate approach: in the preamble,


but it doesn't carry along to subsections; for that you'd need



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