Sequence with 2 parameters (?)

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SUMMARY

The discussion focuses on understanding a specific mathematical notation involving sequences with two parameters. Participants express confusion regarding the meaning of "it" under the variables and the interpretation of "0 over z," questioning whether it signifies a sequence with two dimensions or a multiplication of sequence member numbers. The conversation highlights the importance of context in interpreting mathematical symbols, noting that subscripts and superscripts can have varied meanings beyond simple iterations and powers.

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Cinitiator
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Homework Statement


Could anyone please help me understand this notation? What is "it" under the variables? Is it some kind of sequence notation with 2 dimensions, or sequence notation which has the sequence member number multiplied by some other variable? What is this?

Also, what could 0 over z mean, other than 0 exponent?


Homework Equations


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The Attempt at a Solution


Tried Google search without help.
 
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This is truly impossible to answer without knowing the exact source of this equation.
 
I'll second that: what's the context?
Subscripts and superscripts are used for things besides iterations and powers... U238 is not normally read as the 238th power of U for example, and the x component of the initial velocity can be noted as v0x... giving two subscripts.
 
Last edited:

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