### Who Invented Calculus?

Calculus was invented in the late 17th century by the Englishman Isaac Newton. Or by the German Gottfried Leibniz. Or maybe their work was just a natural outgrowth of seeds sown by the Greeks two millennia before. Or maybe the Chinese and the Keralites.

Perhaps none of these statements are mutually exclusive. To see why, I’ll cover what the Greeks and Chinese knew about exhaustion and what the Keralites knew of infinite series, and then move forward to the era of Newton and Leibniz.

Read more →### The Math of the Renaissance

Last week I covered the math of Ancient Greece. Fast-forward about 1,500 years and we’re in the Italian Renaissance, the period which ushered in dramatic changes in art, science, politics, the economy, and of course, mathematics. The three most significant changes, covered below, were the pursuit of formulae for higher order equations (i.e., moving beyond the quadratic formula), modernizing and standardizing mathematical symbols, and coming to a consensus on what seems like a trivial question: What is a number?

Read more →### Drawing the Soul Toward Truth: The Math of Ancient Greece

In my previous posts on the history of math, one theme that came up repeatedly was that the same mathematical ideas arose again and again in different periods and in different cultures. Classic examples of this include the decimal system of numeration, the concept of zero, the basic operations, and even more advanced ideas such as the Pythagorean theorem.

Read more →### Algebra and Restoration

In the final chapter of *The Crest of the Peacock*, Joseph explores the mathematical contributions of the Islamic world, covering the eighth through the thirteenth centuries. One of the central players in this history was Muhammad ibn Musa al-Khwarizmi, who was born in present day Iraq around 780.

### Kerala and the Case for Transmission

Last week I wrote about ancient Indian math, which George Gheverghese Joseph covers in the eight and ninth chapters of *The Crest of the Peacock*. In the tenth chapter Joseph turns his attention to Kerala, on the southwestern tip of the Indian subcontinent.

### What the Ancient Indians Knew

In the eighth and ninth chapters of *The Crest of the Peacock*, George Gheverghese Joseph turns his attention to the mathematical history of India.

### Good Mathematicians Use Counting Rods

In my previous posts on *The Crest of the Peacock* by George Gheverghese Joseph, I summarized the mathematical developments of several pre-Colombian American cultures and of the Egyptian and Mesopotamian cultures.

In the case of the former, it was clear that the math that developed there did so in isolation. In the case of the latter, we can trace clear connections with the West. China, where the book next turns its focus, is more ambiguous.

Read more →### From Egyptian Frustums to Babylonian Sexagesimal

Before diving into the mathematics of the ancient Egyptians, here’s an important question: Were they African? Let’s check a map:

Ah, OK.

Read more →### When Clyde Died

A year ago today, my grandpa died. I wrote this essay shortly after, while the memory of his life and the experience of observing his death were still fresh in mind.

Read more →### Math Before Math Was Math

For many people, the basic story of the history of mathematics is that Greeks came up with a bunch of cool stuff, it was forgotten for a long time, and then Europeans rediscovered Greek knowledge and ran with it from the Renaissance onward. But maybe that’s not exactly right.

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