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April 20th, 2017, 11:12 PM   #1
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Please help me write the formula

Hello,
I need to formulate the follow relationship in proper math symbols:

Differential in A (last day's value minus today's) has a tendency to reach the Differential in B (today's)

I though this could be expressed with

AΔ -> BΔ

But I guess there are more elegant and mathematically correct ways to do this in Maple or Mathcad?

Thank you!
Dave

Last edited by skipjack; April 21st, 2017 at 03:35 AM.
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April 21st, 2017, 01:24 AM   #2
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Not quite sure what you are asking. Can you give more information about A and B?

Let 'last days value' = LV, and 'today's value' = TV.

Then A = LV - TV, and B = TV.

As you have said, you could say $\Delta A = LV - TV$.

If you want to show that '$\Delta A$ approaches B', then you need to determine what causes this to happen.

Or maybe,

A = $V_{i - 1} - V_i, \ i = 1, 2, ...$ where $i$ denotes the current day, and V is the value.
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April 21st, 2017, 03:42 AM   #3
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A definition of "tendency to reach" is needed, else any use of symbols could well be misleading.
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