3 problems

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Conjecture on $j$ -invariants of isogenous elliptic curves
$j$ -invariant conjecture. Then
Conjectureopenelliptic-curves j-invariants reduction-typesarXiv posted 2 days ago
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Classification conjecture for rational isolated j-invariants on X_1(N)
Classification conjecture. If $x\in X_1(N)$ is an isolated point with $j(x)\in\bQ$ , then
Conjectureopenelliptic-curves j-invariants modular-curvesarXiv posted 2 days ago
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Classification conjecture for isolated non-CM rational j-invariants on X_1(N)
Classification conjecture. The only rational $j$ -invariants associated to non-CM elliptic curves that give rise to isolated points on some $X_1(N)$ are
Conjectureopenelliptic-curves j-invariants modular-curvesarXiv posted 2 days ago

Conjecture on jjj-invariants of isogenous elliptic curves