Making Assumptions About Functions
• Use the keyword assume and one or more modifying expressions to make assumptions about the domain of a function in a symbolic expression. For example, you can restrict a function, so it is a real-valued function. All the modifiers that apply to variables also apply to functions.
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The modifier ALL applies only to variables, not to kernels or undefined functions.
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• By default, all unknown functions in Mathcad are complex. Use the real modifier to indicate that a function is real.
Examples
• To restrict the kernels of an unknown real function, use this expression:
• Choose a solution depending on an unknown kernel:
