open set meaning in Hindi

Examples

1. Then, by continuity, the inverse image of that is an open set.
2. By invariance of domain, the map carries open sets onto open sets.
3. Note that the neighbourhood V need not be an open set itself.
4. As elements of the topology, cylinder sets are by definition open sets.
5. The weak topology is generated by the following basis of open sets:
6. Every open set is a countable union of a collection of these.
7. An arbitrary union of open sets in a topological space is open.
8. That is, the intersection of almost open sets is again almost open.
9. By invariance of domain, the map carries open sets onto open sets.
10. In fact, its open sets are even inaccessible by " any " suprema.