Bonus

Mello et al. used the concepts of blocked and non-blocked connections in this model to mimic people respecting lockdowns during the COVID-19 pandemic. For 10 points each:
[10m] Name this model that is generalized by the Potts model. Lars Onsager (“AWN-sah-ger”) used the transfer-matrix method to give an analytic description of the two-dimensional version of this model.
ANSWER: Ising (“EE-zing”) model [or Lenz–Ising model]
[10h] Mello et al. showed that the probability of being infected equals the probability of this phenomenon. A point named after this phenomenon was shown to be one-half for a square integer lattice by Harry Kesten.
ANSWER: percolation [accept percolation probability or percolation point]
[10e] The Ising model is more commonly used to model this phenomenon, which disappears above the Curie temperature. This phenomenon is exhibited by cobalt, nickel, and iron.
ANSWER: ferromagnetism [prompt on magnetism]
<Physics>
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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
Arizona StateGeorgia State001010E
Columbia BMichigan001010E
Cornell AMIT1001020ME
Georgia TechVirginia Tech1001020ME
Illinois ANorth Carolina A1001020ME
Illinois BMaryland1001020ME
IndianaWaterloo A1001020ME
Johns HopkinsChicago B1001020ME
NYULSE1001020ME
Ohio StateVirginia1001020ME
OttawaFlorida1001020ME
RutgersStanford1001020ME
TexasMinnesota1001020ME
Toronto ANorthwestern1001020ME
Toronto BIowa State1001020ME
Toronto CHarvard1001020ME
UC Berkeley AChicago A1001020ME
UC Berkeley BPenn State1001020ME
UCFNorth Carolina B1001020ME
VanderbiltRIT1001020ME
WUSTL AColumbia A1001020ME
Waterloo BWUSTL B1001020ME
Winona StateCornell B1001020ME
YaleBritish Columbia1001020ME

Summary

TournamentExact Match?HeardPPBEasy %Medium %Hard %
2025 ACF NationalsYes2419.17100%92%0%