For prime level p, the Ceresa cycle of X0(p) is nontrivial if and only if X0(p) is not hyperelliptic; for general N, only finitely many X0(N) can have a vanishing Ceresa cycle.
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Ceresa Cycles of $X_{0}(N)$
For prime level p, the Ceresa cycle of X0(p) is nontrivial if and only if X0(p) is not hyperelliptic; for general N, only finitely many X0(N) can have a vanishing Ceresa cycle.