A raw conversion yields an . You cannot search for “cohomology operations” or “Hurewicz theorem”. To fix that, we OCR after conversion.
For high quality (deskewing crooked pages common in old Spanier scans): spanier algebraic topology djvu to pdf
, here is a review of the book and the best ways to handle the file conversion safely. The Book: Algebraic Topology by Edwin Spanier Spanier’s Algebraic Topology A raw conversion yields an
ocrmypdf --deskew --clean --remove-background \ --output-type pdfa spanier_raw.pdf spanier_searchable.pdf For high quality (deskewing crooked pages common in
This outputs the number of pages. For Spanier, expect ~500 pages (depending on the edition). Also check for hidden layers (text layer for search).
This article explores why Spanier’s text remains vital, why the DJVU format became a standard for mathematical digitization, and the practicalities and legalities of converting these files into the more ubiquitous PDF format.