Push_Czeros - Texas Instruments TI-89 Developer's Manual

944

push_czeros

Declaration: void push_czeros (EStackIndex k , EStackIndex vi )
Category(ies): Solver
Description: If vi is one variable or guess, pushes onto the estack a list of zero or more
real or unreal values that make the expression(s) indexed by k equal to
zero when substituted for the variable.
Otherwise pushes an empty list if the function could not find any
simultaneous zeros of the list of expressions indexed by k .
Otherwise pushes a matrix of real and/or unreal values, with each column
representing the corresponding element variable of vi , and each row
representing an alternate list of corresponding values that make all of the
expressions in the list indexed by k equal to zero.
All fractional powers are interpreted using the principal branch.
Issues XR_USE_CSOLVE_WARN when there are additional zeros that
cannot be expressed in this form.
If invoked via push_internal_simplify, vi and k are simplified to deepest
variable(s).
Inputs: k
vi
Outputs: None
Assumptions: None
Side Effects: None
Availability: On AMS 2.02 and higher.
TI-89 / TI-92 Plus
Differences: None
See Also: push_solve, push_csolve, push_zeros, push_nSolve
Example:
push_quantum_as_nonnegative_int (2u);
exponent = top_estack;
push_quantum (8u);
replace_top2_with_pow (exponent);
add1_to_top ();
expression = top_estack;
push_quantum (8u);
push_czeros (expression, top_estack);
TI-89 / TI-92 Plus Developer Guide
— Index of the top tag of an algebraic expression or a list thereof.
— Indexes of the top tag of a variable, an equation of the form
variable = constant representing an initial guess, or a list of
variables and/or such initial guesses.
/* Push variable x */
/* top_estack -> x^2 */
/* top_estack -> x^2 + 1 */
/* push variable x */
/* top_estack -> { i , - i } */
Not for Distribution
Appendix A: System Routines — Solver
Beta Version January 26, 2001