For n = 2, h-cobordism theorem is equivalent to the Poincaré conjecture stated by Poincaré in 1904 (one of the Millennium Problems and was proved by Grigori #Perelman in a series of 3 papers in 2002 and 2003 where he follows Richard S. Hamilton's program using #Ricciflow

For n = 2, h-cobordism theorem is equivalent to the Poincaré conjecture stated by Poincaré in 1904 (one of the Millennium Problems and was proved by Grigori #Perelman in a series of 3 papers in 2002 and 2003 where he follows Richard S. Hamilton's program using #Ricciflow