Sigma Notation for Λ1 + Λ2 + Λ3 +...+ Λn = 1

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Discussion Overview

The discussion revolves around the notation for the sum of a series of terms represented as Λ1 + Λ2 + Λ3 + ... + Λn = 1, specifically focusing on how to express this using sigma notation. The scope includes mathematical reasoning and notation conventions.

Discussion Character

  • Mathematical reasoning

Main Points Raised

  • One participant asks how to notate the sum using sigma notation.
  • Another participant suggests using sigma notation as Σ(k=1,n) λk = 1.
  • A third participant confirms the previous suggestion and provides the TeX version: \sum_{k=1}^n{\Lambda_k}=1.
  • One participant mentions an alternative notation using "i" instead of "k" and questions its correctness.
  • Several participants agree that the choice of letter in sigma notation is arbitrary, emphasizing that it serves merely as a placeholder.

Areas of Agreement / Disagreement

Participants generally agree that the choice of index letter in sigma notation is not significant, but there is no explicit consensus on the preferred notation format.

Contextual Notes

Some participants express uncertainty about inputting the notation into a TI-nspire CAS calculator, indicating potential limitations in the calculator's functionality regarding subscripts.

JDude13
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How do I notate this:

[tex]\Lambda_{1}+\Lambda_{2}+\Lambda_{3}+\ldots+\Lambda_{n}=1[/tex]

using sigma notation?
 
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Sigma (k=1,n) lambdak = 1
 
mathman is correct, but here is the TeXed version:

[tex]\sum_{k=1}^n{\Lambda_k}=1[/tex]
 
I had a guess which was exactly the same as yours except with an "i" instead of a "k".
It's not important but... Was I right?

Also; does anyone know how to imput this into a TI-nspire CAS calculator (I can't get the subscript thing to work)?
 
JDude13 said:
I had a guess which was exactly the same as yours except with an "i" instead of a "k".
It's not important but... Was I right?

It doesn't matter what letter you use. It's just a placeholder. You could put puppy there if you wanted. :biggrin:
 
gb7nash said:
It doesn't matter what letter you use. It's just a placeholder. You could put puppy there if you wanted. :biggrin:
Good one. I always say "Fred". No idea why!
 
Hurrah! I'm not entirely useless!
 

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