Take a look at this blog. The author is doing a study of Griffiths' book on Quantum Mechanics: http://physicsfromthebottomup.blogspot.com/2009/02/the-quantum-gang.html
You'll see a lot of explanations and solved exercises and I think that with your background you are able to understand what's...
This is the gist of the argument:
1- The result of the multiplication of integers is an integer. Hence p_1p_2...p_n is an integer
2- The result of the addition of integers is an integer. Hence p_1p_2...p_n+1 is an integer
3- The fundamentel theorem of arithmetics states that all natural...
Thanks for your reply Stephen and sorry for not being specific enough.
In that case let us assume that I'm analyzing the sales of a given product on given time frame (say 6 months).
What I want to be able to do is:
understand if the sales are experiencing an upward or downward tendency...
Given a time series with data points x_1, x_2, x_3,...,x_n I want to be able to extrapolate its future behaviour. I can see three options:
count of how many terms of (x_(i+1)-x_i) are positive and negative
Assume linearity and calculate m for the best...