Is_Independent_Of - Texas Instruments TI-89 Developer's Manual

Appendix A: System Routines — Algebra Utilities

is_independent_of

Declaration: Boolean is_independent_of (EStackIndex i , EStackIndex j )
Category(ies): Algebra Utilities
Description: Determines whether the expression indexed by i is syntactically
independent of the expression indexed by j .
i , j — Indices of the top tags of internally-simplified expressions.
Inputs:
Returns TRUE if the expression indexed by i is syntactically independent of
Outputs:
the expression indexed by j . Otherwise returns FALSE.
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: is_free_of_tag, is_independent_of_tail, is_tail_independent_of
Example:
Boolean is_tail_independent_of (EStackIndex i, EStackIndex j)
{ for (;;)
{ if (END_TAG == ESTACK (i))
return TRUE;
else if (is_independent_of (i, j))
i = next_expression_index (i);
else
return FALSE;
}
}
TI-89 / TI-92 Plus Developer Guide Not for Distribution
251
Beta Version January 26, 2001