The conjecture on the -topology

Let KK be a large field, and let the EK\mathscr{E}_K-topology denote the topology introduced in the paper. A topology is gt-henselian when it is a gt-henselian topology on KK.

The EK\mathscr{E}_K-topology conjecture. If KK is large, then the EK\mathscr{E}_K-topology is the intersection of all gt-henselian topologies on KK. Consequently, the EK\mathscr{E}_K-topology is a field topology if and only if there is a coarsest gt-henselian topology on KK.

For countable large fields this equivalence is known, while the conjecture asks for the general case.

Sources & referencesView supporting material

Primary source

Erik Walsberg, “Derivations and gt-henselian field topologies”, arXiv:2509.02889 (2025).

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