On free Boolean vectors.
We describe an ongoing project carried out by the Mathematical Institute of Serbian Academy of Sciences and Arts, and the Faculty of Mathematics, Belgrade. The project concerns building of electronic resources and presentations of electronic editions of mathematical works in Serbia, including retro-digitization of old books, articles and the other mathematical works, and development of the corresponding virtual library. The resources built in the project are freely accessible through Internet.
We discuss in some detail some of the drawbacks of PDF files obtained from mathematical papers prepared in TeX, particularly concerning indexing, copy/paste and OCR capabilities.
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