Colmez's product formula for CM abelian varieties

Let XX be a CM abelian variety over a number field KK, let EE be its CM algebra with CM-type Φ\Phi, let HE=HomQ(E,Qalg)H_E=\operatorname{Hom}_Q(E,Q^{\rm alg}), and assume the notation ωψη\omega_\psi^\eta, uηu_\eta, and ωψη,ωcψη,uηv\langle \omega_\psi^\eta,\omega_{c\psi}^\eta,u_\eta\rangle_v is as above, with vv ranging over the places of QQ and η\eta over the embeddings of KK. Colmez's product formula. The sum in the preceding regularized expression should be zero, equivalently

vηHKωψη,ωcψη,uηvv=1.\prod\limits_v\prod\limits_{\eta\in H_K}\bigl|\langle \omega_\psi^\eta,\omega_{c\psi}^\eta,u_\eta\rangle_v\bigr|_v=1.

This is the product-formula form of Colmez's period conjecture; the supplied text gives no resolution status for this formulation.

Sources & referencesView supporting material

Primary source

Urs Hartl and Rajneesh Kumar Singh, “Product Formulas for Periods of CM Abelian Varieties and the Function Field Analog”, arXiv:1809.02990 (2020).

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