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SIQR testing and isolation model: competing exits cap · case 02

With aggressive testing prevalence becomes negative.

Member previewVariant 2 · 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	`[[12.0, 3.312, 0.868, 0.224, 0.058], 9.451, 26.218]`	`[[9.231, 5.317, 2.989, 1.657, 0.912], 12.859, 30.703]`	Failed

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