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Figure 6
Left: the triangular cone TC = {[(r_{12},r_{01},r_{02}) \in{\bb R}^{3}\mid 0\leq r_{12}\leq r_{ 01}\leq r_{02}] [\neq 0]} is the space of all root invariants, see Definition 3.1[link]. Middle: TC projects to the quotient triangle QT representing all two-dimensional lattices up to isometry and uniform scaling. Right: QT is parameterized by [x = \bar{r}_{02}-\bar{r}_{01}\in[0,1)] and [y = 3\bar{r}_{12}\in[0,1]].

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ISSN: 2053-2733
Volume 79| Part 1| January 2023| Pages 1-13
https://doi.org/10.1107/S2053273322010075
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