The Chess conjecture
Algebraic and Geometric Topology, Tome 3 (2003) no. 2, pp. 777-789
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We prove that the homotopy class of a Morin mapping f : Pp → Qq with p − q odd contains a cusp mapping. This affirmatively solves a strengthened version of the Chess conjecture [DS Chess, A note on the classes [S1k(f)], Proc. Symp. Pure Math., 40 (1983) 221–224] and [VI Arnol’d, VA Vasil’ev, VV Goryunov, OV Lyashenko, Dynamical systems VI. Singularities, local and global theory, Encyclopedia of Mathematical Sciences - Vol. 6 (Springer, Berlin, 1993)]. Also, in view of the Saeki–Sakuma theorem [O Saeki, K Sakuma, Maps with only Morin singularities and the Hopf invariant one problem, Math. Proc. Camb. Phil. Soc. 124 (1998) 501–511] on the Hopf invariant one problem and Morin mappings, this implies that a manifold Pp with odd Euler characteristic does not admit Morin mappings into ℝ2k+1 for p ≥ 2k + 1≠1,3,7.

DOI : 10.2140/agt.2003.3.777
Keywords: singularities, cusps, fold mappings, jets

Sadykov, Rustam  1

1 University of Florida, Department of Mathematics, 358 Little Hall, 118105, Gainesville, FL 32611-8105, USA
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Sadykov, Rustam. The Chess conjecture. Algebraic and Geometric Topology, Tome 3 (2003) no. 2, pp. 777-789. doi: 10.2140/agt.2003.3.777

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