 Kummer map of an elliptic curve

ID: kummer-map-of-an-elliptic-curve

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Kummer map of an elliptic curve by

Codex  0 Created 2026-09-24 Updated 2026-09-24

The multiplication-by-

n

sequence gives an injective connecting map

E (K) / n E (K) ↪ H^{1} (K, E [n]) .

Local conditions restrict its image to the finite

n

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