{
  "statement": "You may assume H3 below without proof. Prove H4 below. No other checkpoint result is granted.\n\n**Given: H3**\n\nThere exists an absolute constant \\(C\\ge1\\) such that, for every totally real number field \\(F\\) of degree \\(f=[F:\\mathbb Q]\\), the field\n\\[\nK=F(\\mathrm i),\\qquad \\mathrm i^2=-1,\n\\]\nsatisfies\n\\[\n\\operatorname{rd}(K)\\le2\\operatorname{rd}(F),\n\\qquad\nh(K)\\le\\bigl(C\\operatorname{rd}(F)\\bigr)^{2f}.\n\\]\n\nHere \\(h(K)\\) is the ideal class number of the ring of integers of \\(K\\). The constant \\(C\\) is independent of \\(F\\) and \\(f\\).\n\nHere \\(\\operatorname{rd}(L)=|\\operatorname{Disc}(L)|^{1/[L:\\mathbb Q]}\\) is the root discriminant of a number field \\(L\\), and all logarithms are natural.\n\n**Target: H4**\n\nThere exist a fixed integer \\(m\\ge1\\), a fixed real number \\(\\gamma>0\\), a sequence of number fields \\((K_j)_{j\\ge1}\\), and finite sets \\(U_j\\subset K_j\\), such that, writing \\(d_j=[K_j:\\mathbb Q]\\), one has\n\\[\nd_j\\longrightarrow\\infty,\n\\qquad\nU_j\\subset m^{-1}\\mathcal O_{K_j},\n\\qquad\n|U_j|\\ge\\exp(\\gamma d_j).\n\\]\nFor every \\(j\\ge1\\), every \\(u\\in U_j\\), and every field embedding \\(\\sigma:K_j\\hookrightarrow\\mathbb C\\),\n\\[\n|\\sigma(u)|=1.\n\\]\n\nHere \\(\\mathcal O_{K_j}\\) is the ring of integers of \\(K_j\\), and \\(m^{-1}\\mathcal O_{K_j}=\\{a/m:a\\in\\mathcal O_{K_j}\\}\\). The same constants \\(m\\) and \\(\\gamma\\) apply to every \\(j\\).",
  "starting_statement": "There exists an absolute constant \\(C\\ge1\\) such that, for every totally real number field \\(F\\) of degree \\(f=[F:\\mathbb Q]\\), the field\n\\[\nK=F(\\mathrm i),\\qquad \\mathrm i^2=-1,\n\\]\nsatisfies\n\\[\n\\operatorname{rd}(K)\\le2\\operatorname{rd}(F),\n\\qquad\nh(K)\\le\\bigl(C\\operatorname{rd}(F)\\bigr)^{2f}.\n\\]\n\nHere \\(h(K)\\) is the ideal class number of the ring of integers of \\(K\\). The constant \\(C\\) is independent of \\(F\\) and \\(f\\).\n\nHere \\(\\operatorname{rd}(L)=|\\operatorname{Disc}(L)|^{1/[L:\\mathbb Q]}\\) is the root discriminant of a number field \\(L\\), and all logarithms are natural.",
  "target_statement": "There exist a fixed integer \\(m\\ge1\\), a fixed real number \\(\\gamma>0\\), a sequence of number fields \\((K_j)_{j\\ge1}\\), and finite sets \\(U_j\\subset K_j\\), such that, writing \\(d_j=[K_j:\\mathbb Q]\\), one has\n\\[\nd_j\\longrightarrow\\infty,\n\\qquad\nU_j\\subset m^{-1}\\mathcal O_{K_j},\n\\qquad\n|U_j|\\ge\\exp(\\gamma d_j).\n\\]\nFor every \\(j\\ge1\\), every \\(u\\in U_j\\), and every field embedding \\(\\sigma:K_j\\hookrightarrow\\mathbb C\\),\n\\[\n|\\sigma(u)|=1.\n\\]\n\nHere \\(\\mathcal O_{K_j}\\) is the ring of integers of \\(K_j\\), and \\(m^{-1}\\mathcal O_{K_j}=\\{a/m:a\\in\\mathcal O_{K_j}\\}\\). The same constants \\(m\\) and \\(\\gamma\\) apply to every \\(j\\).",
  "case_id": "H3-to-H4",
  "given_context": {
    "premise": "There exists an absolute constant \\(C\\ge1\\) such that, for every totally real number field \\(F\\) of degree \\(f=[F:\\mathbb Q]\\), the field\n\\[\nK=F(\\mathrm i),\\qquad \\mathrm i^2=-1,\n\\]\nsatisfies\n\\[\n\\operatorname{rd}(K)\\le2\\operatorname{rd}(F),\n\\qquad\nh(K)\\le\\bigl(C\\operatorname{rd}(F)\\bigr)^{2f}.\n\\]\n\nHere \\(h(K)\\) is the ideal class number of the ring of integers of \\(K\\). The constant \\(C\\) is independent of \\(F\\) and \\(f\\).\n\nHere \\(\\operatorname{rd}(L)=|\\operatorname{Disc}(L)|^{1/[L:\\mathbb Q]}\\) is the root discriminant of a number field \\(L\\), and all logarithms are natural."
  },
  "protocol": "single"
}