Geometric proof of the easy part of the Hopf invariant one theorem

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Geometric proof of the easy part of the Hopf invariant one theorem. (English). Mathematica Slovaca, vol. 49 (1999), issue 1, pp. 71-74

MSC: 55Q25, 57R42 | MR 1804475 | Zbl 0941.55011

References:

[1] ADAMS J. F.: On the non-existence of elements of Hopf invariant one. Ann. of Math. (2) 72 (1960), 20-104. MR 0141119 | Zbl 0096.17404

[2] ADEM J.: The iteration of Steenrod squares in algebraic topology. Proc. Nat. Acad. Sci. U.S.A. 38 (1952), 720-726. MR 0050278

[3] HIRSCH M.: Immersions of manifolds. Trans. Amer. Math. Soc. 93 (1959), 242-276. MR 0119214 | Zbl 0113.17202

[4] MILLER J. G.: Self-intersections of some immersed manifolds. Trans. Amer. Math. Soc. 136 (1969), 329-338. MR 0234480 | Zbl 0186.57401

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