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We review the construction of holography for cosmologies with an emphasis onasymptotically de Sitter cosmologies. We do this by composition of the AdS/CFTcorrespondence and domain-wall/cosmology (DW/C) correspondence with the noveladded benefit of keeping track of the DW/C marker $\eta$. This allows us tobuild explicitly the holographic dual of the DW/C correspondence. We then testthis framework on a toy model: the GPPZ flow. We find the scalar one-pointfunction for this flow to be invariant under the domain-wall/cosmologycorrespondence. Moreover, our construction seems to agree with previousliterature on holography for cosmologies.

On the holographic domain-wall/cosmology correspondence and scalar one-point functions