IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This illustrated pamphlet describes ...

A long-standing puzzle seems to constrain how addition and multiplication relate to each other. A graduate student has gone further than anyone else in establishing the connection. In 1983 the ...

Multiplication is calculating the sum of groups of the same size. There are lots of ways to build and describe multiplication problems. Using repeated addition, you can add equal groups together, one ...