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CCCC – p. 21<br />
Holonomy corrections<br />
Hypersurface-deformation algebra with pointwise holonomy<br />
corrections: H −→ l −1 sin(lH) in perturbative cosmology.<br />
Incomplete: Corrections in series expansion cannot be<br />
separated from higher space and time derivatives. (R ∼ ∂Γ+Γ 2 )<br />
with β = cos(2lH).<br />
[S(⃗w 1 ),S(⃗w 2 )] = −S(L ⃗w2 ⃗w 1 )<br />
[T(N),S(⃗w)] = −T(⃗w · ⃗∇N)<br />
[T(N 1 ),T(N 2 )] = S(β(N 1<br />
⃗ ∇N2 −N 2<br />
⃗ ∇N1 ))<br />
−w ′′ +β∆w +(ã ′′ /ã)w = 0<br />
β = −1 at maximal density (maximum of sin(lH), “bounce”).<br />
[J Reyes 2009; A Barrau, T Cailleteau, J Grain, J Mielczarek 2011]