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Hello.

 

I used MapleSim to obtain system's equation by "Equation Extraction."

In the equation, there is a strange command displayed as "preopt" and I have no idea know what this command does.

This command appears in piecewise that contains roots.

I used helps (both Maple's help and the help on the website) and googles but still don't get any idea.

 

Can anyone tell me what "preopt" command is?

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