= Karim A. Malik
{c}
<Karim A. Malik> developed the treatment of gauge-invariant cosmological curvature with <David Wands>, <David H. Lyth> and <Andrew R. Liddle>. Their 2000 analysis derived large-scale evolution from <stress-energy conservation>, exposing how a <non-adiabatic pressure perturbation> can change the <uniform-density curvature perturbation>.<A new approach to the evolution of cosmological perturbations on large scales by David Wands and others>[Sections II–V: pressure source and generalized adiabatic perturbations]{ref}
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