Hi Vela,
When I multiply out the brackets I get the following (please forgive my not having LaTeX):
EpqrEqjkAjBk + EpqrErmnCnDn
If I then cycle the subscripts Epqr becomes Eqrp and the other Epqr becomes Erpq:
EqrpEqjkAjBk + ErpqErmnCnDn
This, hopefully, let's me use the...
Thank you Vela for your help with this it is very much appreciated as this is my first exposure to the power of the permutation tensor. I was wondering if you could answer one final stupid question on this if you have the time as I'm not sure whether to multiply out of the brackets separately...
Homework Statement
Prove using the Levi-Civita Tensor/Kroenecker Delta that:
(AxB)x(CxD) = (A.BxD).C-(A.BxC).D
Homework Equations
εіјkεimn = δjmδkn – δjnδkm (where δij = +1 when i = j and 0 when i ≠ j)
The Attempt at a Solution
if E = (AxB) then Ei = εіјkAjBk, and
if F =...
Thanks Mathman and apologies for posting this in the wrong area it won't happen again, and your help is greatly appreciated by a mature student whose grey cells seem to be white
Solve the equation below to gain an expression for θ(t), where v, β and r₀ are constants and the only variables are time(t) and theta(θ):
vt=r₀θ+βθ²/2
The exercise is based upon the spiral data track of a compact disc and either side of the equation is equal to the displacement. I’ve...