48: = 0 of their eta function, and used this to show that Hirzebruch's signature defect of a cusp of a Hilbert modular surface can be expressed in terms of the value at
69:; Donnelly, H.; Singer, I. M. (1983), "Eta invariants, signature defects of cusps, and values of L-functions",
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of a singularity measures the correction that a singularity contributes to the signature theorem.
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Hirzebruch, Friedrich E. P. (1973), "Hilbert modular surfaces",
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introduced the signature defect for the cusp singularities of
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30:Hilbert modular surfaces
67:Atiyah, Michael Francis
72:Annals of Mathematics
129:10.5169/seals-46292
161:Singularity theory
54:Shimizu L-function
75:, Second Series,
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