On the geometry of the
moduli spaces of semi-stable sheaves supported on plane quartics . Preprint (2009).
We decompose each moduli space of semi-stable sheaves on the complex projective
plane with support of dimension one and degree four into locally closed
subvarieties, each subvariety being the good or geometric quotient of a set of
morphisms of locally free sheaves modulo a reductive or a non-reductive group.
We find locally free resolutions of length one of all these sheaves and
describe them.
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