FA-13552 / Numerical aggregation / Member archive

Recursive exponential level: The final sample is omitted from the recursion. · case 02

The reduction disagrees with its explicit aggregation oracle.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

For 0<=p<=q and q>0, initialise the recursive level to the first observation and update y=(p/q)*x+(1-p/q)*y for each later observation. Empty input returns None; return exact Fraction string.

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	`"5"`	`"9/2"`	Failed

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

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