- #1
Septimra
- 27
- 0
A difference matrix takes the entries of a vector and computes the differences between the entries like
[x1 - 0 ] = difference from 0 and x1: 1 step
[x2 - x1] = difference from x2 and x1: 1 step
[x3 - x2] = difference from x3 and x2: 1 step
assuming we had a vector x in Ax = b
So why now when it becomes centered, does it become
[x2 - 0 ] = difference from x2 and 0: 1 step
[x3 - x1] = difference from x3 and x1: 1 step
[0 - x3] = difference from 0 and x3: -3 steps!
[x1 - 0 ] = difference from 0 and x1: 1 step
[x2 - x1] = difference from x2 and x1: 1 step
[x3 - x2] = difference from x3 and x2: 1 step
assuming we had a vector x in Ax = b
So why now when it becomes centered, does it become
[x2 - 0 ] = difference from x2 and 0: 1 step
[x3 - x1] = difference from x3 and x1: 1 step
[0 - x3] = difference from 0 and x3: -3 steps!
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