Just because your co-worker sent you a PDF file instead of the Excel document you wanted doesn't mean you're actually stuck with it. In this guide, we'll teach you how to convert a PDF into an ...

What do the integers have in common with the symmetries of a triangle? In the 19th century, mathematicians invented groups as an answer to this question. Mathematics started with numbers — clear, ...

Written at a level suitable for graduate students in mathematics, the only prerequisites are linear algebra and basic graph theory; no prior knowledge of physics is required. The text serves as an ...

The Introduction to Religion series covers a range of topics in the field of religious studies. Covering all major religious traditions and their sub-sects, volumes in the series offer comprehensive ...