X is the topological space, and p is the neighborhood. Moreover, U is the open set.
Therefore, V include p.
In a metric space M=(X,d), V is a set and the neighborhood of p which is the center of the open ball.
r is the radius of Br(p).
2020年4月30日木曜日
neighborhood
In general topology, a neighborhood is in a set which is opened but still closed. This is like the concept of my website.
X is the topological space, and p is the neighborhood. Moreover, U is the open set.
Therefore, V include p.
In a metric space M=(X,d), V is a set and the neighborhood of p which is the center of the open ball.
r is the radius of Br(p).
X is the topological space, and p is the neighborhood. Moreover, U is the open set.
Therefore, V include p.
In a metric space M=(X,d), V is a set and the neighborhood of p which is the center of the open ball.
r is the radius of Br(p).
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