>>13 補足
https://ivanfesenko.org/wp-content/uploads/2021/11/232.pdf
CLASS FIELD THEORY, ITS THREE MAIN GENERALISATIONS, AND APPLICATIONS
IVAN FESENKO
This text was published in EMS Surveys, 8(2021) 107?133.

Here are some relations between the three generalisations of CFT and their further developments:
2dLC?−− 2dAAG−−− IUT
　l　　　／　　｜　　　　　｜
　l　 ／　　　 ｜　　　　　｜
　l／　　 　　 ｜　　　　　｜
　LC 　　 2dCFT　 anabelian geometry
　＼　　　　　 ｜　　　　 ／
　 　＼　　 　 ｜　　　／
　　　　＼　　 ｜　 ／
　　　　　 　 CFT
(引用終り)

下記のProblemがいいね
(FESENKO)
Problem 1. Develop fuller LC analogues of Parts II-IV of CFT.
Problem 2. Find a version of enhanced arithmetic LC parallel to GCFT.
Problem 3. Find a version of enhanced LC parallel to SCFT but which works over all number fields.
Problem 4. Find a version of enhanced LC parallel to some of post-cohomological CFT, thus circumventing the problem of using non-abelian cohomology.
Problem 5. Develop a general ramification theory for surfaces compatible with 2dCFT and taking into careful account ramification theory at the one-dimensional residue level.
Problem 6. Develop a special higher CFT which uses torsion structures, to provide new insights into 2dCFT.
Problem 7. Find more direct relations between the generalisations of CFT. Use them to produce a single unified generalisation of CFT.