Owner's Manual

TI-89 / TI-92 Plus Calculus Tools Page 31
curvatur
(expression, var)
Returns the curvature of
expression
with respect to
var
.
Use F2 5:Curvature to display the problem-entry dialog box
and example for this function.
div
(exprList, varList)
Returns the rectangular Cartesian
n
-dimensional divergence
of the vector represented by
exprList
with respect to the
n
coordinate variables in
VarList
.
Use F5 2:Divergence to display the problem-entry dialog box
and example for this function.
Note
The number of components in
exprList
must equal the
number of variables in
varList
.
erf
(complexNumber)
Returns the approximate numeric error function of
complexNumber
.
Use F6 1:Error Function, erf to display the problem-entry
dialog box and example for this function.
erfc
(complexNumber)
Returns the approximate complementary error function of
complexNumber
.