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References to 'clopen subset'
1. a connected and locally path connected space is path connected by Mathprof
2. balls in ultrametric spaces are clopen subsets by MFH
3. Boolean subalgebra by CWoo
4. connected locally compact topological groups are $\sigma$-compact by asteroid
5. door space by CWoo
6. example of Boolean algebras by CWoo
7. F\"urstenberg's proof of the infinitude of primes by mathcam
8. identity theorem by fernsanz
9. index of properties of topological spaces by rspuzio
10. M. H. Stone's representation theorem by rspuzio
11. ordinal space by CWoo
12. P-space by CWoo
13. proof of spaces homeomorphic to Baire space by gel
14. regular open algebra by CWoo
15. regular open set by CWoo
16. scattered space by CWoo
17. separated by matte
18. Stone functor by porton
19. subgroup of topological group is either clopen or has empty interior by asteroid
20. topological group by yark
21. zero dimensional by matte