I don't understand this

[Udicoudco]

On Mon, Jun 12, 2023 at 8:32 PM Herbert Voss <Herbert.Voss at fu-berlin.de> wrote:
> No, because unicode-math loads amsmath by default which defines \mathbb

\mathbb isn't defined in amsmath, but in amsfonts, which should not be used
with unicode-math (and as a consequence, neither amssymb should be used
with unicode-math).
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