FA-65174 / Epidemic compartment models / Member archive

SIQR testing and isolation model: isolated infectiousness · case 04

Isolation does not slow transmission.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Daily Euler SIQR: infectives recover (gamma*I) or are detected (detect*I), both exits scaled down proportionally if they exceed I; isolated Q do not transmit and are released to R at Q/isolation_days; report daily detections, final Q and final R rounded to 3.

Why this case matters

Compartmental epidemic calculations drive outbreak forecasts, vaccine targets and hospital planning; a single wrong flow, rate conversion or boundary silently changes every downstream number.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: aggressive testing saturates exits	`[[9.231, 5.317, 5.384, 6.298, 7.454], 25.139, 47.844]`	`[[9.231, 5.317, 2.989, 1.657, 0.912], 12.859, 30.703]`	Failed

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