Open sets ,closed set and neighbourhood system of a topological space

This video gives a concept of open sets , closed sets and neighbourhood system of a topological space
Link for introduction of topology :
• An introduction to top...
Link for examples of topological spaces:
• Examples of topologica...

[@emanueleria8151]

a clean elaboration

[@KargutShara]

Mam please make more videos.... On other topics of topology...thank you🙏

[@knowledge9677]

Mam aur video banayi ye topology se related

[@ahammadmostafahossain6269]

Mam , In closed set portion , is tao T is topology on X? In my side, tao T is not topology on X , because here tao T={ phi, {a}, { b}, {a,b}, X} but {a,b} intersection X= {c} which does not belongs to tao T , so tao T is not topology on X. is this true ? please check mam
Thanking you ,,

[@ahammadmostafahossain6269]

sorry for this mam .. I have a mistake this {a,b} intersection X= {c} . true is {a,b} intersection X= {a,b }.. ,. So all are correct . again sorry for this

[@sabugeorge5001]

Check closed sets example. It is wrong because its complemts are not member of TAU

[@raminderkaur4739]

Complements of open sets which are members of T are taken as closed sets. So its correct. Please check again.