Limit of Absolute Values and Metric Spaces

In summary, the conversation discusses the limits of two sequences, $x_{m(k)}$ and $x_{n(k)}$, and whether or not it can be said that the limit of their difference is equal to $\varepsilon$. The discussion also mentions the use of a metric $d$ on a metric space.
  • #1
ozkan12
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Let $\lim_{{k}\to{\infty}}d\left({x}_{m\left(k\right)},{x}_{m\left(k\right)-1}\right)=\varepsilon$ and $\lim_{{k}\to{\infty}}d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)}\right)=\varepsilon$...Can we say that $\lim_{{k}\to{\infty}}d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)-1}\right)=\varepsilon$ by using$\left| d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)-1}\right)-d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)}\right) \right|\le d\left({x}_{m\left(k\right)},{x}_{m\left(k\right)-1}\right)$...Thank you for your attention...Best wishes :)
 
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  • #2
ozkan12 said:
Let $\lim_{{k}\to{\infty}}d\left({x}_{m\left(k\right)},{x}_{m\left(k\right)-1}\right)=\varepsilon$ and $\lim_{{k}\to{\infty}}d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)}\right)=\varepsilon$...Can we say that $\lim_{{k}\to{\infty}}d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)-1}\right)=\varepsilon$ by using$\left| d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)-1}\right)-d\left({x}_{n\left(k\right)},{x}_{m\left(k\right)}\right) \right|\le d\left({x}_{m\left(k\right)},{x}_{m\left(k\right)-1}\right)$...Thank you for your attention...Best wishes :)

Is $d$ corresponds to a metric on a metric space ?
 
  • #3
Yes, $d$ correspond to metric on $(X,d)$ metric space.
 

FAQ: Limit of Absolute Values and Metric Spaces

1. What is absolute value?

Absolute value is a mathematical concept that represents the distance of a number from 0 on a number line. It is always a positive value, regardless of the sign of the number.

2. How is absolute value calculated?

The absolute value of a number is calculated by removing the negative sign, if present, and leaving the number as it is if it is positive. This means that absolute value is always equal to the positive form of a number.

3. What is the significance of absolute value in mathematics?

Absolute value is important in mathematics because it allows for the comparison of numbers without considering their signs. It is also used in many mathematical operations, such as finding the distance between two points in a coordinate plane.

4. What is a limit in mathematics?

In mathematics, a limit is the value that a function or sequence approaches as the input or index approaches a certain value. It is used to describe the behavior of a function or sequence near a particular point or as the input or index approaches infinity.

5. How is the limit of a function or sequence evaluated?

The limit of a function or sequence can be evaluated by plugging in values that approach the desired input or index value and observing the resulting outputs. Alternatively, mathematical techniques such as L'Hopital's rule or the squeeze theorem can be used to evaluate limits analytically.

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