Introduces a secondary pairing between subgroups of K-homology and K-theory valued in Q/Z that detects classes missed by the primary pairing and relates it to relative eta invariants, the Thomsen exact sequence, and zeta maps.
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2026 1verdicts
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A secondary pairing between K-theory and K-homology, relative eta invariants, and zeta maps
Introduces a secondary pairing between subgroups of K-homology and K-theory valued in Q/Z that detects classes missed by the primary pairing and relates it to relative eta invariants, the Thomsen exact sequence, and zeta maps.