Abstract
Let $A(M)$ be the automorphism group of the middle homology of a smooth 4-manifold $M$ and $D(M)$ be the subgroup induced by diffeomorphisms of $M$. In this paper we give explicit generators of $D(M)$ for rational and ruled 4-manifolds. We also prove the uniqueness of reduced forms for classes with minimal genus 0 and non-negative square.
Citation
Bang-He Li. Tian-Jun Li. "On the diffeomorphism groups of rational and ruled 4-manifolds." J. Math. Kyoto Univ. 46 (3) 583 - 593, 2006. https://doi.org/10.1215/kjm/1250281750
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