Error, empty script base - Maple Programming Help

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Error, empty script base

Error, invalid base

 Description These are 2-D math parser errors. They occur when you attempt to execute an expression that has a superscript or subscript with no base.

Examples

Example 1

 > ${}^{b}+{x}^{2}$
 $+{x}^{2}$

This error occurred because the $b$ exponent is not attached to a base. To create this error, you must actively go back after creating the exponent and erase the base. Using standard keystroke or palette entry, the base is included before a superscript or subscript can be added.

Solution:

To fix this error, ensure that any superscripts or subscripts are attached to a base.

 > ${x}^{b}+{x}^{2}$
 ${{x}}^{{b}}{+}{{x}}^{{2}}$ (2.1)

Example 2

 > ${}_{b}-{x}^{5}$
 $-{x}^{5}$

In this example, a subscript is missing the required base.

Solution:

To fix the error, ensure the subscript is attached to a base.

 > ${x}_{b}-{x}^{5}$
 ${{x}}_{{b}}{-}{{x}}^{{5}}$ (2.2)

Example 3

 >
 ${x}^{2}-$

This is the same type of error, but the missing base for the superscript $b$ is found inside the expression. The 2-D math parser returns a slightly different error, because it is interpreting the superscript as a base, which is invalid.

Solution:

Just like the "empty script base" error, you must ensure that any superscripts or subscripts include a valid base.

 > ${x}^{2}-{x}^{b}$
 ${{x}}^{{2}}{-}{{x}}^{{b}}$ (2.3)