Kervaire, Michel A.; Milnor, John W. Groups of homotopy spheres. I. (English) Zbl 0115.40505 Ann. Math. (2) 77, 504-537 (1963). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 13 ReviewsCited in 349 Documents MathOverflow Questions: Is the meaning of ”irreducible manifold”, ”not reducible to other manifold”? Keywords:topology × Cite Format Result Cite Review PDF Full Text: DOI Link Online Encyclopedia of Integer Sequences: Number of h-cobordism classes of smooth homotopy n-spheres. Order of subgroup bP_{m+1} of group Theta_m of h-cobordism classes of smooth homotopy m-spheres defined by those homotopy m-spheres which bound parallelizable (m+1)-manifolds, where m = 2n+1.