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Setting Purpose
Recursive Evaluation Specify the maximum number of embedded variables allowed in an interactive evaluation. See also
Recursive Replacement.
Recursive Replacement Specify the maximum number of embedded variables allowed in a single evaluation in a program.
See also Recursive Evaluation.
Recursive Function Specify the maximum number of embedded function calls allowed.
Epsilon Any number smaller than the value specied for epsilon will be shown as zero.
Probability Specify the maximum probability of an answer being wrong for non-deterministic algorithms. Set
this to zero for deterministic algorithms.
Newton Specify the maximum number of iterations when using the Newtonian method to nd the roots of
a quadratic.
Setting the form of menu items
One setting that aects the CAS is made outside the CAS Settings screen. This setting determines whether
the commands on the CAS menu are presented descriptively or by their command name. Here are some
examples of identical functions that are presented dierently depending on what presentation mode you
select:
Descriptive Name Command Name
Factor List ifactors
Complex Zeroes cZeros
Groebner Basis gbasis
Factor by Degree factor_xn
Find Roots proot
The default menu presentation mode provides the descriptive names for the CAS functions. If you prefer the
functions to be presented by their command name, deselect the Menu Display option on the second page of
the Home Settings screen.
Using an expression or result from Home view
When you are working in CAS, you can retrieve an expression or result from Home view by tapping
and selecting Get from Home. Home view opens. Press or until the item you want to retrieve is
highlighted, and then press . The highlighted item is copied to the cursor point in CAS. You can
also use a copy ( ) and paste ( ) operation.
52 Chapter 4 Computer algebra system (CAS)
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