Why the the other supremum sum is bigger

In summary, the other supremum sum may be larger than the original due to additional terms or a different calculation method. To determine which sum is larger, the values must be compared using techniques such as simplification or finding the limit. The other supremum sum can be smaller if terms are reduced or disregarded. Comparing supremum sums has real-world applications in various fields and proving that the other supremum sum is larger requires a mathematical proof using properties of supremum and infimum and techniques such as induction or contradiction.
  • #1
transgalactic
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  • #2
transgalactic said:
i can't understand this part of the solution..

its seems like the same thing

Hi transgalactic! :smile:

That's sup(xn + yn) ≤ sup{xn} + sup{yn} …

the sum of two things can't be larger than the sum of their maximum possible values …

but it can be smaller (for example, xn = 0 and yn = 1 for n odd, but xn = 1 and yn = 0 for n even … then sup(xn + yn) = 1, but sup{xn} + sup{yn} = 2)

what's worrying you about that? :smile:
 
  • #3
ahh thanks
:)
 

1. Why is the other supremum sum larger than the original?

The other supremum sum may be larger due to the inclusion of additional terms or a different method of calculating the sum. This can result in a higher overall value for the sum.

2. How do we determine which supremum sum is larger?

To determine which supremum sum is larger, we must compare the values of each sum. This can be done by simplifying each sum to a common form or by using mathematical techniques such as finding the limit of each sum.

3. Can the other supremum sum ever be smaller than the original?

Yes, the other supremum sum can be smaller than the original if the terms are reduced or the method of calculation yields a lower value. This can occur when working with infinite sums or when certain terms are disregarded.

4. Are there any real-world applications for comparing supremum sums?

Yes, comparing supremum sums can be used in various fields such as economics, physics, and statistics. It can help determine the maximum possible value of a variable or the highest attainable level of a certain quantity.

5. How can we prove that the other supremum sum is indeed larger?

Proving that the other supremum sum is larger requires a rigorous mathematical proof. This can be done by using the properties of supremum and infimum, as well as various mathematical techniques such as induction or contradiction.

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