The proposed relations for the coefficient ring of the 2-typization of the universal Abel formal group law

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Let FAb\mathcal{F}_{Ab} be the universal Abel formal group law, and let its 22-typization have coefficient ring presented as a quotient of the localized Brown–Peterson coefficient ring BP∗=Z(2)[v1,v2,…]BP_* = \mathbb{Z}_{(2)}[v_1,v_2,\ldots]. Write RR for the ideal of relations and let ∣vi∣=2(2i−1)|v_i|=2(2^i-1). For indices 1≤i<j1\leq i<j and 1≤i′<j′1\leq i'<j', let PP denote a monomial not divisible by any v1vi′2vj′2v_1v_{i'}^2v_{j'}^2. The proposed relations. The coefficient ring is isomorphic to

Λ=Z(2)[v1,v2,…]/R,\Lambda=\mathbb{Z}_{(2)}[v_1,v_2,\ldots]/R,

and all generating relations have the form

v1vi2vj2∼P,1≤i<j.v_1v_i^2v_j^2\sim P,\qquad 1\leq i<j.

These relations are motivated by explicit low-degree computations of the kernel of the classifying map for the 22-typized Abel formal group law; the parser supplies no evidence that the proposed presentation has been proved or disproved, so its status remains open.

References

Primary source

Malkhaz Bakuradze and Mamuka Jibladze, “Some explicit expressions concerning formal group laws”, arXiv:1310.0783 (2014).

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