definition of 1st-countable topological space
Topics
About: topological space
The table of contents of this article
Starting Context
- The reader knows a definition of topological space.
- The reader knows a definition of neighborhoods basis at point on topological space.
Target Context
- The reader will have a definition of 1st-countable topological space.
Orientation
There is a list of definitions discussed so far in this site.
There is a list of propositions discussed so far in this site.
Main Body
1: Structured Description
Here is the rules of Structured Description.
Entities:
\(*T\): \(\in \{\text{ the topological spaces }\}\)
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Conditions:
\(\forall t \in T (\exists B_t \in \{\text{ the countable neighborhoods bases at } t\})\)
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