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Wavelets and file compression | Tangente
In March, Yves Meyer received the Abel Prize for "his pivotal role in the development of the mathematical theory of wavelets." Emerging in the early 1980s, the field quickly became indispensable to image processing. The JPEG 2000 compression standard is based on it.
Betting on the presidential election: readers vs. the polls
Many of you took part in the challenge of coming as close as possible to the presidential election result. The winner is Élisabeth Pietravalle. Far behind, Ipsos proves to be the best polling institute.
Tangente turns 30: 30 ways to support it
The magazine Tangente, which is about to celebrate its 30th anniversary, has become an international benchmark and a fixture in the world of mathematics. Yet your support is more vital than ever to keep it going.
The luthiers' secret code decrypted | Tangente
The luthiers of the Parisian house Gand & Bernardel, a famous dynasty of violin makers from 1795 to the Second World War, had a code that let them work on their slips with complete discretion.
Logjam flaw in the HTTPS protocol | Tangente
A Franco-American team of researchers has just cheated… but for a good cause! Their goal? To verify the cryptographic mechanisms used to secure communications on the Internet.
Poincaré, geometry and robotics | Tangente
Mathematics, and geometry in particular, is an essential component of that most technical of fields: robotics. The concept of space, which the mathematician Henri Poincaré (1854–1912) explored in depth, lies at the heart of the robotics engineer's work.
Online algorithmsMaking decisions without knowing the future
The gift of foreseeing the future would obviously be a considerable advantage. Who has never dreamed of it? Without a crystal ball, mathematics allows us to make decisions that cost us relatively little, even though we do not know what the future holds. Welcome to the world of online algorithms.