FA-63430 / Actuarial life tables / Member archive

Select and ultimate mortality lookup: Select durations are indexed from the projection start · case 05

Projections starting mid-select reuse early-duration rates.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Input select {issue age: [q for durations 0..period-1]}, ultimate {attained age: q}, issue_age, period, dur, n. For each duration k in dur..dur+n-1 use the select rate row[issue][k] while k<period, else the ultimate rate at attained age issue+k. Missing rows -> 'no select row' / 'no ultimate rate'. Return [rates, survival over the n years rounded to 6].

Why this case matters

Life-table arithmetic compounds across ages, so one misplaced index or assumption shifts every downstream value.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
mid-select start	`[[64, 80, 189, 201], 0.99467]`	`[[80, 98, 189, 201], 0.994332]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.