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Limit vs limit point. #limit #point #metric #space #convergent #cauchy

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                    In the previous section we see the convergent and Cauchy sequences in a metric space with their properties. We see that a limit point is a point to which a sequence is convergent. Also every convergent sequence in a metric space is a Cauchy sequence and  the converse of the theorem i.e., every Cauchy sequence is not convergent.We illustrate it  with an example by considering (0,1] as metric space and a sequence {1/n} which is Cauchy but not convergent in (0,1] in detail. In the following there is an introduction to few points and few definitions. Now take a look upon them. Contents : 1. Limit vs limit point 2. Every where dense or dense set 3. Nowhere dense set 4. Boundary and boundary point of a set 1 . Limit vs limit point :-       Some times we often use the terms limit and limit points. Are they both have same meaning? This is a confusion to every reader.  On the real line...

EUCLIDEAN LINE, PLANE AND SPACES #EUCLIDEAN #LINE #PLANE #SPACES

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EUCLIDEAN LINE, PLANE AND SPACES         We know about the real line or real number system R, R is one dimensional. Consider the two dimensional plane R 2 ={(a ,b)/ a ,b  Ꜫ  R}. In R 2  ,the elements of the form (a ,b) are called the ordered pairs of a & b. In R 2 , the addition and multiplication are defined as for x=( a 1 , b 1 ) , y=( a 2 , b 2 ) in R 2                                                                        x +y=(a 1+ a 2 ,b 1+ b 2  ) and x .y=(a 1. a 2  ,b 1. b 2 ) Here R 2  is called as an Euclidean  plane. Now consider the three dimensional space R 3 ={(a ,b ,c )/ a ,b ,c  Ꜫ  R}. In R 3 ,the elements of the form (a ,b ,c) are called ordered triples of a, b, c. The addition and multiplication in  R 3  are same...