Sample
brick/math 0.19.1: Distinguish Euclidean modulo vs remainder, auto-canonicalized BigRational, null lowest set bit on zero, and BigDecimal fractional parts in brick/math
Verified sample for composer brick/math 0.19.1: Distinguish Euclidean modulo vs remainder, auto-canonicalized BigRational, null lowest set bit on zero, and…
sha256:a302318b21f9aedec43716ce13a7d12ac5de3255a5f41a21d5d458695884d22b
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How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
php linux x64 php php composer
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| php 8 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · composer@1 |
2026-08-16 |
| php 8 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · composer@1 |
2026-08-18 |
Case
HOW- Goal
- Distinguish Euclidean modulo vs remainder, auto-canonicalized BigRational, null lowest set bit on zero, and BigDecimal fractional parts in brick/math
- Packages
- Symbols
-
- Brick\Math\BigInteger::mod
- Brick\Math\BigInteger::remainder
- Brick\Math\BigInteger::getLowestSetBit
- Brick\Math\BigRational::ofFraction
- Brick\Math\BigDecimal::getFractionalPart
- Environment
- php
- Created
- 2026-08-16T08:29:38Z
Contract
- assert BigInteger::mod returns non-negative Euclidean result (2) for negative dividend instead of truncated remainder (-1)
- assert BigInteger::remainder preserves truncated division remainder sign (-1)
- assert BigInteger::mod throws InvalidArgumentException on negative modulus while remainder allows it
- assert BigRational::ofFraction automatically simplifies fractions to canonical lowest terms on creation
- assert BigInteger::getLowestSetBit returns null on zero instead of legacy -1
- assert BigDecimal::getFractionalPart returns BigDecimal value 0.45 rather than raw digit string 45
- assert BigInteger::sqrt defaults to RoundingMode::Unnecessary and throws on non-square integers unless RoundingMode::Down is passed
Files
- NOTES.md
- composer.json
- composer.lock
- csx.json
- src/ArithmeticOps.php
- test/contract.php