- #1
Luterinho
- 2
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I am having a hard time understanding the conditions that set a plane to be called a region.
According to definition 2.68, a set in the plane is called a region if it satisfies the following two conditions (p. 14):
1. "Each point of the set is the center of a circle whose entire interior consists of points of the set."
2. "Every two points of the set can be joined by a curve which consists entirely of points of the set."
I am having a hard time understanding the first condition. Can anyone provide an illustration in order to decipher the first condition meaning?
Thank you for help.
According to definition 2.68, a set in the plane is called a region if it satisfies the following two conditions (p. 14):
1. "Each point of the set is the center of a circle whose entire interior consists of points of the set."
2. "Every two points of the set can be joined by a curve which consists entirely of points of the set."
I am having a hard time understanding the first condition. Can anyone provide an illustration in order to decipher the first condition meaning?
Thank you for help.