I mailed comments to Wu on her work on re-identifying Virgo Cluster member galaxies within the SDSS (which covers Virgo almost completely). This is a non-trivial project, because we are trying to cross-identify every member of Binggeli's original Virgo Cluster Catalog.
I tried to understand the role (and values) of the chemical potential in early-universe thermodynamics. I guess it should be obvious, but it has been a long time since I have taken a statistical physics class.
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