starlike region

starlike region

[′stär‚līk ‚rē·jən]
(mathematics)
A region in the complex number plane such that the line segment joining any of its points to the origin lies entirely in the region.
References in periodicals archive ?
Let D [subset] C be a starlike region with respect to the origin.
Let D be a starlike region in the complex plane C with respect to z = [alpha].