Gilles Cohen
61 articles published in Tangente
Math for everyoneN°175Mar 24, 2017Bullseye at 1,000!
The Affaire de Logique column, published every week in Le Monde by Élisabeth Busser and Gilles Cohen, has just passed the milestone of issue 1,000! To mark the occasion, a major competition, Dans le 1000 (Bullseye at 1,000), is being held over twenty-five weeks (covering problems 1001 to 1025), with prizes to be awarded in November 2017, during Tangente's 30th-anniversary celebrations.
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Reading noteN°175Mar 24, 2017Bet on the presidential election!
To mark the French presidential election, which coincides with the special report Tangente is devoting to betting, we invite our readers to bet… on the candidates' scores! It's free, and thousands of euros in gift vouchers are up for grabs.
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Math for everyoneN°175Mar 23, 2017Algebraic identities in series
What happens if we try to calculate sums containing an ever-increasing number of terms? That is the challenge tackled by the study of sequences and series.
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Math for everyoneN°174Jan 19, 2017"A taste for maths": See what's on!
The City of Paris libraries are devoting their 2017 programme, particularly in January and February, to the world of mathematics
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Math for everyoneN°173Nov 21, 2016A taste for maths... through reading!
Inspiring an interest in mathematics through popular science books lies at the heart of many recent initiatives. By a happy coincidence, in early 2017 the City of Paris libraries are launching an event with precisely this aim. Its title? "A taste for maths."
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Math for everyoneN°61Oct 06, 2016Naming the elements of a set
As David Hilbert famously remarked, assigning a name to a mathematical object is artificial. Identifying an object with its image under a bijection, however, so as to bring out its properties, can be decisive.
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History and CultureN°171Jul 07, 2016André Warusfel: popularizer and educator
André Warusfel, who passed away on 6 June 2016 at the age of 80, was active across every facet of mathematics over the course of his fifty-year career.
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Math for everyoneN°170May 13, 2016The APB software
A software program assigns students who have just passed the baccalauréat according to their preferences. But the opacity of how it works leaves room for a number of concerns.
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Math for everyoneN°59Apr 25, 2016Equations of a line
What defines a line, and in what geometric setting? Each possible answer leads to a representation from which the corresponding equations follow.
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History and CultureN°167Jan 25, 2016Mathematics all around: awards for creators
Many writers, artists and game designers, whether professional or amateur, incorporate a mathematical dimension into their work. Every year, the Tangente Awards honor some of them.
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Games and ChallengesN°167Jan 19, 2016Solving problems—and winning prizes
A great many competitions, most of them aimed at school students, involve solving problems. Some are international, national, regional or local; contestants may take part individually, in groups or as whole classes. What they all share is a desire to motivate young people to engage with mathematics.
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Math for everyoneN°168Jan 07, 2016Tangente Trophies 2015: The Results
In addition to the Tangente Book Prize, two other trophies were awarded on December 9 at the Palais du Luxembourg: the Bernard Novelli Prize and the Best Article Prize.
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