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Bernstein to power basis: complement signed coefficient · case 02
The exact bernstein to power basis result violates the stated contract at complement signed coefficient.
Case contract
Input Bernstein coefficients b0..bn as integers; return exact ascending power coefficients of sum bi*choose(n,i)*t^i*(1-t)^(n-i).
Why this case matters
Exact discrete arithmetic with observable algorithmic state; no floating point approximation is used.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| explicit oracle 0 | [-1, -1] | [-1, 1] | Failed |
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