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20E06 - Group theory and generalizations :: Structure and classification of infinite or finite groups :: Free products, free products with amalgamation, Higman-Neumann-Neumann extensions, and generalizations

  1. PSL_2(\mathbb{Z}) is a free product owned by rm50
  2. free product owned by yark
  3. free product with amalgamated subgroup owned by mathcam
  4. free products and group actions owned by rm50
  5. HNN extension owned by juanman
  6. proof of Scott-Wiegold conjecture owned by whm22
  7. Scott-Wiegold conjecture owned by whm22

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