Hervé Lehning
90 articles published in Tangente
KnowledgeN°58Feb 22, 2016The spread of epidemics
When faced with what seems to be the start of an epidemic, how can we predict how it will develop and spread geographically? Mathematical models attempt to answer these questions.
Read →
N°58Feb 10, 2016Tips for testing or estimating
How can we cut the cost of tests or estimate the size of groups of infected people without knowing which ones they are? Here are a few tricks!
Read →
Math for everyoneN°167Feb 01, 2016The king of geometry: Thales' theorem
In France, Thales' theorem concerns parallel lines and proportionality. Its proof, combining algebra and plane geometry, is remarkably elegant. It also leads naturally to two landmark results in triangle geometry: Menelaus' and Ceva's theorems.
Read →
Math for everyoneN°168Jan 07, 2016Percentage tennis
Everyone talks about them, but few enthusiasts know what they really mean: probabilities play a major role in tennis, and players are best off adapting to them. Although the same issue arises in every sport, it has been studied most thoroughly in tennis.
Read →
Math for everyoneN°168Jan 07, 2016Geometry and ball games
In ball sports, the constraints imposed by the rules have strategic implications rooted in geometry, whether the sport is team-based or individual
Read →
Math for everyoneN°168Jan 06, 2016The engine of mathematics
Mathematical progress owes much to conjectures, large and small, that challenge mathematicians. This was true long before Landon Clay and others offered million-dollar prizes: conjectures are the engine of mathematics.
Read →