A class of contractible open 3-manifolds is defined. It is shown that all contractible open 3-manifolds which can be written as a union of cubes with a bounded number of handles are in this class. It ...
Annals of Mathematics, Second Series, Vol. 160, No. 1 (Jul., 2004), pp. 359-373 (15 pages) In 1970 Alexander Grothendieck [6] posed the following problem: let Γ 1 ...
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