Francisco Javier González-Acuña

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Francisco Javier González-Acuña (nickname "Fico") is a mathematician in the UNAM's institute of mathematics and CIMAT, specializing in low-dimensional topology.

He did his graduate studies at Princeton University, obtaining his Ph.D. in 1970. His thesis, written under the supervision of Ralph Fox, was titled On homology spheres.

An early result of González-Acuña is that a group G is the homomorphic image of some knot group if and only if G is finitely generated and has weight at most one. This result (a "remarkable theorem", as Lee Neuwirth called it in his review), was published in 1975 in the highly respected journal, Annals of Mathematics. In 1978, together with José María Montesinos, he answered a question posed by Fox, proving the existence of 2-knots whose groups have infinitely many ends.

With Hamish Short, González-Acuña proposed and worked on the cabling conjecture: the only knots in the 3-sphere which admit a reducible Dehn surgery, i.e. a surgery which results in a reducible 3-manifold, are the cable knots. This conjecture is one of the most relevant, unresolved questions in the theory of Dehn surgery on knots in the 3-sphere.

González-Acuña has made other significant contributions, which have been published in journals such as Transactions of the American Mathematical Society, Topology and Mathematical Proceedings of the Cambridge Philosophical Society.

[edit] References

González-Acuña, F., Homomorphs of knot groups, Annals of Mathematics (2) 102 (1975), no. 2, 373--377. MR 0379671
González-Acuña, F., Montesinos, José M., Ends of knot groups, Annals of Mathematics (2) 108 (1978), no. 1, 91--96. MR 0559794
González-Acuña, F., Short, Hamish, Knot surgery and primeness. Math. Proc. Cambridge Philos. Soc. 99 (1986), no. 1, 89--102. MR 0809502
J.C. Gómez-Larrañaga, F.J. González-Acuña, J. Hoste. Minimal Atlases on 3-manifolds, Math. Proc. Camb. Phil. Soc. 109 (1991), 105-115. MR 1075124