REAL_RAT_NEG_CONV : term -> thm

SYNOPSIS
Conversion to negate a rational literal of type :real.

DESCRIPTION
The call REAL_RAT_NEG_CONV `--c`, where c is a rational literal of type :real, returns the theorem |- --c = d where d is the canonical rational literal that is equal to c's negation. The literal c may be an integer literal (&n or -- &n), a ratio (&p / &q or -- &p / &q), or a decimal (#DDD.DDDD or #DDD.DDDDeNN). The returned value d is always put in the form &p / &q or -- &p / &q with q > 1 and p and q sharing no common factor, or simply &p or -- &p when that is impossible.

FAILURE CONDITIONS
Fails if applied to a term that is not the negation of one of the permitted forms of rational literal of type :real.

EXAMPLE
  # REAL_RAT_NEG_CONV `-- (-- &3 / &2)`;;
  val it : thm = |- --(-- &3 / &2) = &3 / &2

SEE ALSO
REAL_RAT_ABS_CONV, REAL_RAT_ADD_CONV, REAL_RAT_DIV_CONV, REAL_RAT_EQ_CONV, REAL_RAT_GE_CONV, REAL_RAT_GT_CONV, REAL_RAT_INV_CONV, REAL_RAT_LE_CONV, REAL_RAT_LT_CONV, REAL_RAT_MAX_CONV, REAL_RAT_MIN_CONV, REAL_RAT_MUL_CONV, REAL_RAT_POW_CONV, REAL_RAT_REDUCE_CONV, REAL_RAT_RED_CONV, REAL_RAT_SUB_CONV.