((p q) -> (p -> q))
((C1 -1C1) (C1 0))
((xRx) z1(xRz1))
# - -
@ - -
#' - -1 -
@' - -1 -
[n] -
<n> -
[n]'-
<n>'-
& - -
| - -
~ - -
-> -
<- -
<-> -