f is continuous iff f inverse C is closed set in X for every closed set C in Y | Real Analysis

f from x to y is continous iff f inverse C is Closed set in X for a Closed set C in Y | Theorem | Continuity of function | Limit and Continuity | Real analysis | OMG Maths | Classes By Cheena Banga. | #omgmaths Pdf link: https://omgmaths.com/real-analysis/f-... Visit our Website:https://omgmaths.com/ ***Limit and Continuity***    • Limit and Continuity | Real Analysis   ***Real Analysis playlist***    • Real Analysis   useful for Msc | BSC | NET | NBHM | LPU | DU | IIT JAM | TIFR Other topics covered in playlist: Limit Inferior and limit superior definition and theorems Cauchy Sequence in Compact Metric Space is Convergent nth tail of sequence Tail of a sequence P Series Test for convergence of series Limit Comparison Test for Convergence Cantor Intersection Theorem E is a subset of metric space X then Diameter of closure of E is equal to Diameter of E Cauchy First theorem on limits Bolzano Weierstrass Theorem Every bounded sequence has a convergent sub sequence Every Cauchy sequence is a Bounded sequence Every convergent Sequence is cauchy sequence Cauchy Sequence Cauchy Sequence Definition Cauchy Sequence theorems Sub sequence of a sequence Algebraic Properties of Limits Algebra of limit of sequence Properties of limit limit laws of sequence sandwich theorem squeeze theorem Sequence and series real sequence range of sequence constant sequence uniqueness theorem Sequences in metric space limit of sequence Convergent sequence Every connected subset of R is an interval The Real line R is connected Every interval is connected In R, intervals and only intervals are connected. A subset E of R is connected iff E is an interval compactness in Real Analysis Connectedness in Real Analysis Compactness in topology Connectedness in topology compactness connectedness theorems of compactness theorems of connectedness Heine-Borel theorem Closed Set | definition | theorems set is closed iff its complement is open Bolzano weierstrass theorem : Every infinite bounded subset of R has a limit point. Definition of Neighbourhood of a point Definition of Open set infinite intersection of open sets need not to be open Union of two NBDS is NBD Intersection of NBDS is NBD Superset of a NBD is also a NBD Every Open interval (a,b) is neighbourhood of each of its points. Closed interval is neighbourhood of each point except end points. real numbers is NBD of each real number Rational numbers set is not the neighbourhood of any of its points. Metric space | Distance Function | Example Metric space : Definition and Axioms Real Analysis : Introduction and Intervals Union of countable sets is countable Finite,infinite,equivalent,denumerable,countable sets Infinite subset of countable set is countable Field,Ordered Field,complete Ordered Field Set of Integers is Countable Supremum and infimum Set is countably infinite iff it can be written in the form distinct elements Continuum Hypothesis Cartesian product of two countable sets is Countable Set of Rational numbers is Countable Keep Watching OMG Maths Classes by Cheena Banga Definition of metric Space Examples of metric space Open and Closed sets Topology and convergence Types of metric spaces Complete Spaces Bounded and complete bounded spaces Compact spaces Locally compact and proper spaces connectedness Separable spaces Pointed Metric spaces Types of maps between metric spaces continuous maps uniformly continuous maps Lipschitz-continuous maps and contractions isometries Quasi-isometries notions of metric space equivalence Topological properties Distance between points and sets Hausdorff distance and Gromov metric Product metric spaces Continuity of distance Quotient metric spaces Generalizations of metric spaces Metric spaces as enriched categories