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What (who) is cuspy - definition
cuspy
/kuhs'pee/ [WPI: from the DEC abbreviation CUSP, for
"Commonly Used System Program", i.e. a utility program used by
many people ] 1. (of a program) Well-written.
2. Functionally excellent. A program that performs well and
interfaces well to users is cuspy. See rude.
[Jargon File ]
Cuspy halo problem
The cuspy halo problem (also known as the core-cusp problem) refers to a discrepancy between the inferred dark matter density profiles of low-mass galaxies and the density profiles predicted by cosmological N-body simulations. Nearly all simulations form dark matter halos which have "cuspy" dark matter distributions, with density increasing steeply at small radii, while the rotation curves of most observed dwarf galaxies suggest that they have flat central dark matter density profiles ("cores").
