System Flags C - 9
System Flags (continued)
Flag Description
–121
Internal use only. (LN returns LN[ABS()] if set).
–122
Internal use only. (0/0 occurred).
–123
Mode Switch.
Clear: Mode switch allowed.
Set: Mode switch not allowed.
–124
CAS Object Evaluation.
Clear: Non-algebraic CASCOMPEVAL is allowed.
Set: Non-algebraic CASCOMPEVAL is not allowed.
–125
Sign Determination Mode.
Clear: Accurate sign determination using polynomial Sturm sequences.
Set: Fast sign determination. Polynomial Sturm sequences are not used. Auto-
simplification of square roots canceled.
–126
Row Reduction Mode.
Clear: RREF done with last column.
Set: RREF done without last column.
–127
Not used.
–128
Clear: Complex variables allowed.
Set (default): All variables are real.
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