The following summarizes improvements and bug fixes made in version 5.04 of Derive 5 released on 11 April 2001:

Algebra window items:

•        The new File > Write > Rich Text Format File command makes it easy to convert Derive 5 worksheets into a format that can be loaded into word processing programs.  Then, these programs can be used to convert them into a format suitable for use on the Internet.  See the File > Write commandsI2E73C for details.

•        Declared variables that have not been assigned a value are no longer included in the Variable Name list displayed by the Author > Variable Value command2SGW02B dialog box, thus reducing clutter and making it easier to verify other variable values.

•        When a function definition is displayed in a worksheet, strings in the definition are now enclosed in double quotes so they can be easily identified as strings.

•        When uninstalling Derive 5 through the program group shortcut or the Windows Control Panel, the uninstall program now finds the installation log even if the Derive 5 installation directory has spaces in its path name.

Plot window items:

•        Sets of coordinate point pairs (for example, {­[2,3], [1,4], [0,2]} ) can now be included in a vector of expressions to be plotted in the 2D-plot window.

•        Expressions involving the CEILING function can now be plotted without having to first simplify the expressions.

•        When plotting a parameterized expression in the 3D-plot window, the s and t parameter values specified in the Insert > Plot dialog box are now properly correlated with the variables s and t occurring in the expression.

Mathematical items:

•        The built-in string conversion function has been extended to handle function compositions, as well as numbers and variables.  This allows Derive 5 programs to analyze the structure of expressions.  See the String Processing FunctionsString_Processing_Functions for details.

•        Numerous internal improvements have been made in the simplification of expressions involving the trigonometric and hyperbolic functions, and their inverses, on the real line and in the complex plane.

•        Multiple occurrences of the \ set difference operator now associate to the left, so that A \ B \ C is equivalent to (A \ B) \ C instead of A \ (B \ C).

•        A problem adding two identical vectors having one or more 0 elements has been resolved.

•        If the Calculus > Taylor Series commandMRJ3J4 or the TAYLOR function is given an equation or vector, the Taylor series of the elements of the equation or vector are returned.


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