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Empirical cdf supremum: The scan omits positions appearing in only one sample. · case 04

The reduction disagrees with its explicit aggregation oracle.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Return the maximum absolute difference between the right-continuous empirical cumulative distributions of two nonempty integer samples as a Fraction string. Empty either side returns None.

Why this case matters

Exact bounded examples isolate a reduction defect without floating-point or external-service effects.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression 1	`"0"`	`"1"`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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