IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. John Perry Ballantine (1896–1970), a ...

Those learning and using mathematics have long consulted tables of numbers. The ancient Babylonians used clay tablets for this purpose. Papyrus, parchment, and paper all proved suitable for recording ...

Since the start of the 20th century, the heart of mathematics has been the proof — a rigorous, logical argument for whether a given statement is true or false. Mathematicians’ careers are measured by ...

Some results in mathematics have the force of real truths, being independent of interpretation or context. When we state that 2 + 2 = 4 we know that this will be correct for any intelligent entity ...