The Poincaré Conjecture is a question about spheres in mathematics. It is named after Henri Poincaré, the French mathematician and physicist who formulated it in 1904.
ð ə WORD_BOUNDARY p ɔɪ ŋ k ɑ ɹ ɹ eɪ WORD_BOUNDARY k ə n d̠ʒ ɛ k t̠ʃ ə ɹ ɹ WORD_BOUNDARY ɪ z WORD_BOUNDARY ʌ WORD_BOUNDARY k w ɛ s t̠ʃ ə n WORD_BOUNDARY ʌ b aʊ t WORD_BOUNDARY s f ɪ ɹ z WORD_BOUNDARY ɪ n WORD_BOUNDARY m æ θ ɪ m æ t ɪ k s WORD_BOUNDARY ɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY n eɪ m d WORD_BOUNDARY æ f t ə ɹ WORD_BOUNDARY h ɛ n ɹ i WORD_BOUNDARY p ɔɪ ŋ k ɑ ɹ ɹ eɪ WORD_BOUNDARY ð ə WORD_BOUNDARY f ɹ ɛ n t̠ʃ WORD_BOUNDARY m æ θ ɪ m ʌ t ɪ ʃ ə n WORD_BOUNDARY æ n d WORD_BOUNDARY f ɪ z ɪ s ɪ s t WORD_BOUNDARY h uː WORD_BOUNDARY f ɔ ɹ m j ʊ l eɪ t ɪ d WORD_BOUNDARY ɪ t WORD_BOUNDARY ɪ n WORD_BOUNDARY n aɪ n t iː n h ʌ n d ɹ ɪ d WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY