An axiomatic characterization of Duistermaat's triple index enables elementary proofs of its properties and relations to the Maslov and Hörmander-Kashiwara-Wall indices, including a formula for the Morse index of a difference of Hermitian matrices.
Booss-Bavnbek and K
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The calculus of Duistermaat's triple index
An axiomatic characterization of Duistermaat's triple index enables elementary proofs of its properties and relations to the Maslov and Hörmander-Kashiwara-Wall indices, including a formula for the Morse index of a difference of Hermitian matrices.