En be the nth tail of {Xn} Xn is a Cauchy Sequence iff lim (Diam of En) =0 Popular Videos f from x to y is continous at c iff f inverse v is open set in X for an open set v in Y | Theorem | Continuity of function March 6, 2021 Union of countable no of countable sets is countable | Real Analysis February 2, 2021 Sub space of a complete metric space is complete iff it is Closed February 27, 2021 Neighbourhood of a point | NBD | Definition | Real analysis | Metric Space | Topology February 2, 2021 Description En be the nth tail of {Xn} , Xn is a Cauchy Sequence iff lim (Diam of En)=0 View Fullscreen Posted by Cheena Banga | Feb 24, 2021 | Real Analysis, Sequences in metric space | 0 |