At the risk of resurfacing near-traumatic feelings for any readers, I want to share the introduction to the first chapter of the undergradua ...

Avoid using paid third-party apps to convert iPhone photos to PDFs. You can easily save a photo as a PDF on an iPhone using the free Apple Photos app. Convert a photo to a PDF on an iPhone so you can ...

Converting images into PDF files is practical if you want to merge several images into one PDF or save a single image professionally. Whether for printing, sending, or archiving — the PDF format ...

Undergraduate mathematics textbooks are not what they used to be, and Gilbert Strang's superb new edition of Introduction to Linear Algebra is an example of everything that a modern textbook could ...

This introduction to international relations course eschews most of the theory, which tends to be too abstract and divorced from the way the world actually operates. Instead, it focuses on history ...