Push_Factor - Texas Instruments TI-89 Developer's Manual

782

push_factor

Declaration: void push_factor (EStackIndex i , EStackIndex vf ,
FCTR_AMOUNT fctr_amount )
Category(ies): Math
Description: If i indexes a numeric tag then:
If POLY_OR_NMBR_FCTR is equal to fctr_amount and NULL_INDEX is
equal to vf or SQFREE_AND_NMBR_FCTR <= fctr_amount , then the
factored equivalent is pushed; otherwise the number is pushed. Otherwise
the expression is factored through vf , or with respect to all of its variables if
vf is NULL_INDEX.
Complex factors are sought only if IS_DOMAIN_COMPLEX.
Consider 6x^6 - 6x^4 - 6x^2 + 6 with vf = NULL_INDEX and
IS_DOMAIN_REAL:
REAL_FCTRS_ONLY ->
POLY_FCTR ->
POLY_OR_NMBR_FCTR ->
SQFREE_AND_NMBR_FCTR ->
POLY_AND_NMR_FCTR ->
Inputs: i
vf
fctr_amount — One of REAL_FCTRS_ONLY, POLY_FCTR,
Outputs: None
Assumptions: None
Side Effects: None
Availability: On AMS 2.02 and higher.
TI-89 / TI-92 Plus
Differences: None
TI-89 / TI-92 Plus Developer Guide
Appendix A: System Routines — Math
— Indexes the top tag of an algebraic expression, an
algebraic comparison, or an aggregate thereof.
— Equal to NULL_INDEX or indexes the top tag of a
variable.
POLY_OR_NMBR_FCTR,
SQFREE_AND_NMBR_FCTR, or
POLY_AND_NMBR_FCTR.
(continued)
Not for Distribution
6 (x - 1)^2 (x + 1)^2
6 (x - 1)^2 (x + 1)^2 (x^2 + 1)
6 (x - 1)^2 (x + 1)^2 (x^2 + 1)
2 † 3 (x^2 - 1)^2 (x^2 + 1)
2 † 3 * (x - 1)^2 (x + 1)^2 (x^2 + 1)
Beta Version January 26, 2001