D. Kotschick

activity

19952022

most citedBounded cohomology and non-uniform perfection of mapping class groups

57 citations · 499 across the 40 of their papers we have counts for

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2 papers · 1 filter

alg-geom1995★ 11 cited

On irreducible four--manifolds

D. Kotschick

We show that minimal symplectic 4--manifolds with $b_{2}^{+} > 1$ and with residually finite fundamental groups are irreducible. We also give examples of irreducible orientable four--ma…

alg-geom1995

On the blowups of numerical Godeaux surfaces

D. Kotschick

We give a short proof of the following result: Let $X$ be a complex surface of general type. If the canonical divisor of the minimal model of $X$ has selfintersection $= 1$ , then $…