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References to 'Poincar\'e conjecture'
1. famous open questions in mathematics by rspuzio
2. Grigori Perelman by PrimeFan
3. Henri Poincar\'e by Daume
4. homology sphere by bwebste
5. Millennium Problems by Mravinci
6. Poincar\'e dodecahedral space by Mathprof
7. topics on low dimensional topology by juanman