Conversion to prove whether one rational constant of type :real is equal to
The call REAL_RAT_EQ_CONV `c1 = c2` where c1 and c2 are rational
constants of type :real, returns whichever of |- c1 = c2 <=> T or
|- c1 = c2 <=> F is true. The constants c1 and c2 may be integer
constants (&n or -- &n), ratios (&p / &q or -- &p / &q), or decimals
(#DDD.DDDD or #DDD.DDDDeNN).
Fails if applied to a term that is not an equality comparison on two permitted
rational constants of type :real.
# REAL_RAT_EQ_CONV `#0.40 = &2 / &5`;;
val it : thm = |- #0.40 = &2 / &5 <=> T
# REAL_RAT_EQ_CONV `#3.14 = &22 / &7`;;
val it : thm = |- #3.14 = &22 / &7 <=> F