Sigma notation

  • Thread starter bitttttor
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  • #1
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What does this mean? (see attachment)

"Where b is a block defined by the contiguity condition c that may exist between elements of s, and n is the number of elements in that block"

I know is not possible to get a solution without the actual function, but how does this reads?
 

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Answers and Replies

  • #2
HallsofIvy
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That notation is a little ambiguous. Just
[tex]\sum_{c\in S} f(c)[/tex]
would mean "caclulate f(c) for all c contained in set S, then add". But the "n" is problematic- the set S, in general, doesn't even have to be a set of numbers.

My best guest would be "calculate f(c) for all c contained in set S, that are less than or equal to n, then add them."
 
  • #3
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Great, thank you.
 
  • #4
NascentOxygen
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bitttttor, are you able to say more about the background to this? In what context did you find it?
 
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