我试图只将括号内的内容放在上标中:
(2) Let $\overline{h \circ s}(v) = h(\overline s(c)) = h(c^ {\mathfrak_{U}} )$ when $c$ is a constant. \\
(3) $\overline{h \circ s}(f_{t_1}...f_{t_2}) = h(\overline s(f_{t_1}...f_{t_2})) = h (f^{\mathfrak_{U}} (\overline s(t_1), ..., \overline s(t_2))$ when $f$ is a function.
答案1
\mathfrak_{U}
应该\mathfrak{U}
。