|location||Aylesbury Buckinghamshire, UK|
|visits||member for||1 year, 8 months|
quadratic linear form XFX with matrix
F: 1 1 1 1
in canonical base can be expressed as X' F' X'
X' 1 0 X' 0 0
where X'=A-1X, F'=AFA and A is transition matrix. Canonical base vectors are [1,0] and [-1,1]. Thus this is correct that (a+b)^2 = a^2 + b^2 + 2ab