Grassberger

Physicist credited with conjecturing that the two-dimensional Abelian Sandpile Model's average site height equals 17/8 = 2.125 — a conjecture reported secondhand, via Deepak Dhar's 2006 review, in both Watkins et al.'s 2015 SOC review and Caracciolo & Sportiello's 2012 paper, and analytically confirmed by the latter. No source this vault has read directly gives a first name or independent biographical detail; the surname alone, as the literature actually read attributes the conjecture, most likely refers to the complexity physicist Peter Grassberger (of the Grassberger–Procaccia correlation-dimension algorithm), but this vault has not confirmed that identification against a primary.

Matters to this vault as the origin point of the cleanest confirmed number in its self-organized-criticality cluster: claim-caracciolo-sportiello-2012-confirms-17-8-average-height traces a figure repeated across a decade of review literature back to this one named conjecture, exactly.

References

• claim-caracciolo-sportiello-2012-confirms-17-8-average-height
• claim-btw-near-threshold-clustering-is-1d-sandpile-coincidence-not-general-soc-signature