?? spectrum of number ring as exponentiable affine scheme ??? ....
?? function vs measure here ??? ....
spec(z^3) ^ spec(z[i]) .... ???? ....
y X spec(z[i]) -> spec(z^3) .... ???? ....
y -> ???
????? ....
spec(r) X spec(z[i]) = spec(r[i]) .... ????? ....
?? spec(k^3) as alg comm ring .... ???? ...
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