Simplicity of the Hodge Bundle
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Statement
Does the Hodge bundle over the moduli stack of genus curves contain any nontrivial sub-bundles? Posed by Dawei Chen around 2015; the answer is no.
Context
A known question in Teichmüller dynamics since 2015.
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The mathematical content came from Aletheia, a Gemini-Deep-Think-powered agent, from a single prompt asking for a proof; the author verified and wrote the paper.
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Machine check · not human verification
machine: correctscope Expert review reported upstream; the reviewer has no probXiv account and is not credited here
Peer-reviewed and published in PNAS (2026); also public on arXiv.
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