We prove that there exists a universal surface in B^4, analogous to universal knots and links in S^3. We prove that every Dehn twist in a compact orientable surface with boundary is the lift of a half-twist in the disk, with respect to a certain simple branched ccovering.
Branched coverings and 4-manifolds, PhD thesis
ZUDDAS D
2008-01-01
Abstract
We prove that there exists a universal surface in B^4, analogous to universal knots and links in S^3. We prove that every Dehn twist in a compact orientable surface with boundary is the lift of a half-twist in the disk, with respect to a certain simple branched ccovering.File in questo prodotto:
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