Florian Cajori

Born in Switzerland in 1859, Florian Cajori later made his career in the United States and became one of the best-known early historians of mathematics. He is especially remembered for writing clear, ambitious histories that traced how mathematical ideas and notation developed over time.

Cajori taught for many years in Colorado and later at the University of California, Berkeley. Alongside broad surveys such as A History of Mathematics, he also wrote detailed studies of mathematical symbols, the slide rule, and the history of physics, showing a gift for connecting technical subjects with the people and cultures behind them.

He died in 1930, but his work remained influential because it made the history of mathematics accessible without making it feel small or dry. For listeners who enjoy books about science, ideas, and discovery, he stands out as a guide to how mathematics slowly took the shape we know today.