On a Runge theorem over $${\mathbb {R}}_3$$

  title={On a Runge theorem over \$\$\{\mathbb \{R\}\}\_3\$\$},
  author={Cinzia Bisi and Antonino De Martino and Joerg Winkelmann},
  journal={Annali di Matematica Pura ed Applicata (1923 -)},
In this paper we investigate a topological characterization of the Runge theorem in the Clifford algebra R3 via the description of the homology groups of axially symmetric open subsets of the quadratic cone in R3. 



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