Equality of the Schwartz index and the Euler obstruction
Equality of the Schwartz index and the Euler obstruction
Let be a complex analytic germ, let be a local ambient representation, and let be a continuous vector field on with an isolated singularity at inducing a stratified vector field on . Write for the indicator function of . Equality of the Schwartz index and the Euler obstruction.
The Schwartz index is defined for stratified vector fields with an isolated singularity, while the Euler obstruction of the constructible function is defined microlocally through the characteristic cycle. The equality is presented as a conjecture because it is expected from the microlocal interpretation, but the source states that it was not seriously proved there.
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Primary source
Xia Liao and Xiping Zhang, “Microlocal indices and Chern Classes of Foliations”, arXiv:2512.13126 (2026).
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