Grigori Perelman

Разбор утверждений:

• Perelman is a Russian physicist: Неверно. Текст прямо указывает, что он русский математик.
• Perelman is best known for his work on the Poincaré conjecture: Верно. В тексте сказано: "Perelman's solution to the Poincaré conjecture was published in 2006. It was a highly technical paper, and it took many mathematicians several months to understand it. However, once it was understood, it was universally recognised as a brilliant piece of work."
• Perelman was awarded the Nobel Prize in Physics in 2006: Неверно. В тексте упоминается, что он был награжден Fields Medal (Медаль Филдса), а не Нобелевской премией.
• Perelman declined a medal for his discovery in mathematics: Верно. В тексте указано: "Perelman was awarded the Fields Medal in 2006 for his work on the Poincaré conjecture. However, he declined to accept the award."
• Perelman was working on the Riemann hypothesis for three years: Неизвестно. В тексте не упоминается работа над гипотезой Римана.

Ответ: Perelman is best known for his work on the Poincaré conjecture, Perelman declined a medal for his discovery in mathematics