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Figure 1
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Lattice of shapes for N = 3, graded by degree. The top white dot is the state 
, cf. equation (7). Each arrow represents a symmetrized derivative (word) (TaUbVc), cf. equation (9). The word labels are omitted from the arrows for graphical reasons. The bottom black dot is the zero polynomial (not the constant 1). For further details, see the text.