A finite partial cube is a daisy cube precisely when every Θ-class is peripheral; the minimal forbidden pc-minors are the pc-minor-minimal graphs containing a non-peripheral Θ-class, with an explicit infinite family given by deleted-corner products P₃^□r □ Q_s.
Taranenko, Daisy cubes: a characterization and a generalization,Eur
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Peripheral \texorpdfstring{$\Theta$}{Theta}-classes and forbidden partial cube-minors of daisy cubes
A finite partial cube is a daisy cube precisely when every Θ-class is peripheral; the minimal forbidden pc-minors are the pc-minor-minimal graphs containing a non-peripheral Θ-class, with an explicit infinite family given by deleted-corner products P₃^□r □ Q_s.