Let x0 of type ι be given.
Apply subfield_I with
x0,
x0 leaving 7 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H0.
Let x1 of type ι be given.
The subproof is completed by applying H1.
Let x1 of type ι → ι → ο be given.
The subproof is completed by applying H1.
Let x1 of type ι → ι → ο be given.
The subproof is completed by applying H1.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H3.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H3.