This document is incomplete. The external file associated with the glossary ‘mathsymbols’ (which should be called ak_dsp_book.mathsymbols-gls) hasn’t been created.

The file ak_dsp_book.mathsymbols-glo doesn’t exist. This most likely means you haven’t used \makeglossaries or you have used \nofiles. If this is just a draft version of the document, you can suppress this message using the nomissingglstext package option.

This message will be removed once the problem has been fixed.