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Block Relations and Clifford Theory for H-Triples

  • Shi Chen
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Abstract

We study block relations between H-triples of finite groups. We prove a Clifford correspondence theorem in which a single pair of associated projective representations satisfies both the mixed comparison-function identities and the block conditions on every intermediate group. The resulting correspondence preserves relative character heights and yields a common defect group for each pair of corresponding blocks. We also establish induction and gluing results, including an induction criterion that allows unequal Clifford indices. Direct products, wreath products and changes of ambient group are treated within the same framework. These results provide character-triple tools for Galois-equivariant local-global correspondences.

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Cite

BibTeXRIS
BibTeX
@misc{chen2026block,
  title = {{Block Relations and Clifford Theory for H-Triples}},
  author = {Shi Chen},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.33502},
  eprint = {2609.33502},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.33502},
}
RIS
TY  - UNPB
TI  - Block Relations and Clifford Theory for H-Triples
AU  - Shi Chen
PY  - 2026
DA  - 2026/09/27
PB  - arXiv
DO  - 10.48550/arxiv.2609.33502
UR  - https://arxiv.org/abs/2609.33502
AB  - We study block relations between H-triples of finite groups. We prove a Clifford correspondence theorem in which a single pair of associated projective representations satisfies both the mixed comparison-function identities and the block conditions on every intermediate group. The resulting correspondence preserves relative character heights and yields a common defect group for each pair of corresponding blocks. We also establish induction and gluing results, including an induction criterion that allows unequal Clifford indices. Direct products, wreath products and changes of ambient group are treated within the same framework. These results provide character-triple tools for Galois-equivariant local-global correspondences.
ER  -