Let $I$ be an ideal of a regular local ring $R$ such that $I$ is reflexive as an $R$-module (https://stacks.math.columbia.edu/tag/0AUY) .
Then is $I$ a principal ideal (i.e. a free $R$-module i.e. a cyclic $R$-module) ?
2026-02-22 20:55:42.1771793742
reflexive ideal in regular local ring
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