Is superlinear convergence always better than linear convergence?

In summary, the conversation is discussing the concept of superlinearly convergence and its relation to linear convergence. It is suggested to look up the definition of a linearly convergent sequence and see if it implies superlinearly convergence. The definition of linear convergence is also mentioned. It is then discussed how a superlinearly converging sequence must be smaller than a constant M, which has implications for the original sequence in terms of linear convergence.
  • #1
haya
15
0

Homework Statement



[PLAIN]http://im2.gulfup.com/2011-04-01/1301686351321.gif

Homework Equations



superlinearly convergence

The Attempt at a Solution



[PLAIN]http://im2.gulfup.com/2011-04-01/1301686616101.gif

this is what i know about it, kindly help me
 
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  • #2
You should look up the definition of a linearly convergent sequence, and then see if one implies the other. P.ex., if a sequence is linearly convergent, then it is also superlinearly convergent (which would be b in your answers). Or, there are sequences which are linearly convergent, but not superlinearly convergent, vice versa, and some which are both (that would be c). And so on. Of course, only one is right.
 
  • #4
Ok, so assume you have a superlinearly converging sequence {p_n}. Then {c_n} is a zero sequence, so it converges to zero. So, especially (from some n on), it must be smaller than a constant M, right? What does that imply for your original sequence {p_n} in terms of linear convergence?
 

Related to Is superlinear convergence always better than linear convergence?

1. What is superlinealy convergence?

Superlinealy convergence is a mathematical concept used to describe the rate at which a sequence of numbers approaches a limit. It is a stronger form of convergence than linear convergence, meaning that the sequence approaches the limit at a faster rate.

2. How is superlinealy convergence different from linear convergence?

Linear convergence is when a sequence of numbers approaches a limit at a constant rate, while superlinealy convergence is when the rate of convergence increases as the sequence approaches the limit.

3. What are some examples of sequences that exhibit superlinealy convergence?

One example is the sequence 1/n, where n represents the term number. As n approaches infinity, the rate of convergence increases and the sequence approaches 0 at a faster rate. Another example is the Newton's Method for finding roots of equations, where the rate of convergence increases with each iteration.

4. Are there any real-world applications of superlinealy convergence?

Yes, superlinealy convergence has many applications in fields such as optimization, numerical analysis, and machine learning. It can be used to improve the efficiency and accuracy of algorithms and models.

5. How is superlinealy convergence measured?

The rate of superlinealy convergence is typically measured using the asymptotic constant, which is the limit of the ratio between successive terms in the sequence. A higher asymptotic constant indicates a faster rate of convergence.

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