Definition: The term "semiregular" can be defined as a curve that has the following properties: 1. It is not closed, meaning it does not have an endpoint. 2. It is not open, meaning it does not have any boundary points. In other words, if you consider the curve to be continuous and without holes or corners, then it is semiregular. However, this definition assumes that the curve is defined by a single equation, which in general may not be the
closed bracket.
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