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Bug fix for ECNF downloader#7005

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edgarcosta merged 2 commits into
LMFDB:mainfrom
rvisser7:ecnf
May 29, 2026
Merged

Bug fix for ECNF downloader#7005
edgarcosta merged 2 commits into
LMFDB:mainfrom
rvisser7:ecnf

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This fixes issue #7004 - the ECNF downloader now parses the coefficients of elliptic curves as rational linear combinations of $a^i$, where previously it wrongly assumed it was integer linear combinations of $a^i$ (this is only true if the base field $K$ is monogenic where $O_K = \mathbb{Z}[a]$).

https://beta.lmfdb.org/EllipticCurve/?download=1&query=%7B%27conductor_norm%27%3A+1%7D&conductor_norm=1&Submit=text
http://localhost:37777/EllipticCurve/?download=1&query=%7B%27conductor_norm%27%3A+1%7D&conductor_norm=1&Submit=text

Comment thread lmfdb/ecnf/main.py Outdated
@edgarcosta edgarcosta merged commit c471e4e into LMFDB:main May 29, 2026
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2 participants