Q.E.D: A History of Math

Mathematics is made of human drama. Q.E.D. stands for the Latin quod erat demonstrandum - which was to be demonstrated. This app is a reader's companion to the history of mathematics: the great theorems, and the people who proved them. You will not have to follow a single line of algebra. Every entry is told in plain language: what it says, and why it matters. Whether you love mathematics or drifted away from it at school, each one is a satisfying ten-minute read before bed. WHAT'S INSIDE - Theorems and turning points, from ancient Greece to the present day - The mathematicians: Thales, Pythagoras, Euler, Gauss, Galois and Ramanujan, alongside Hypatia, Ada Lovelace, Kovalevskaya, and the Japanese tradition of Seki Takakazu, Teiji Takagi and Kenkichi Iwasawa - Arranged by era: Antiquity, Medieval and Renaissance, and the 17th through 21st centuries - New entries arrive with each update FOUR WAYS IN Each entry is divided into What Does It Say?, An Everyday Analogy, Why It Matters, and The Idea Behind the Proof. Few symbols, many comparisons. ANIMATED DIAGRAMS The Pythagorean theorem, the sieve of Eratosthenes, Cantor's diagonal argument, the Koch curve, Euler's identity - the major proofs come with diagrams you can step through one move at a time, or play straight through. THE PROOF IN DETAIL For when you want to go further. Every entry has an expandable, thorough walkthrough. For Hilbert's 23 problems, that means the fate of all twenty-three: the ones that were settled, the ones still open, and the two that were never really problems at all. THE DRAMA BEHIND IT The mathematical duels of sixteenth-century Italy, and the oath Cardano swore to Tartaglia and broke. Galois writing "I have no time" in the margin on the eve of his duel. Wiles, seven years in an attic, handed a gap in his proof weeks after announcing it. Zhang Yitang at fifty-eight, chasing prime gaps while keeping the books for a sandwich shop. The human stories standing behind the theorems. MORE - Theorem of the Day - a new one on your home screen each morning - Timeline of Mathematics - 2,600 years on a single scrolling timeline - Places - birthplaces and workplaces shown on a map - Search - any theorem, person, or keyword in an instant - Saved - bookmark the entries you want to return to - English and Japanese - every word in both, following your device's language WHO IT IS FOR - Anyone who enjoys the history of science - Adults looking for a way back into a subject they left behind - Students who want the story rather than the exercise - Teachers hunting for something to open a lesson with PRICE Everything is free to read. There is no advertising of any kind. The only in-app purchases are optional tips, in three sizes, for anyone who wants to support the work. They unlock nothing whatsoever. No connection is needed. It reads the same in airplane mode or out of signal, and it collects nothing about you. Behind every theorem stands a human story. Enjoy each one, all the way to its closing Q.E.D. ```