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| author | withsky <withsky2002@gmail.com> | 2024-07-17 12:06:34 +0000 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2024-07-17 15:08:04 +0000 |
| commit | fc51e5023ec99fee405ae61ee4ab2c8c9bc66f24 (patch) | |
| tree | 75d1cc6d5578437a2b7977e021bf8e609e11e257 /src/math/big | |
| parent | 90c6558b6acef5a9b9fb8f3c35cff58423c8b00e (diff) | |
| download | go-fc51e5023ec99fee405ae61ee4ab2c8c9bc66f24.tar.xz | |
math/big: fix comment typo in natdiv.go
Comment in line 395:
[x₀ < S, so S - x₀ < 0; drop it]
Should be:
[x₀ < S, so S - x₀ > 0; drop it]
The proof is based on S - x₀ > 0, thus it's a typo of comment.
Fixes #68466
Change-Id: I68bb7cb909ba2bfe02a8873f74b57edc6679b72a
GitHub-Last-Rev: 40a2fc80cf22e97e0f535454a9b87b31b2e51421
GitHub-Pull-Request: golang/go#68487
Reviewed-on: https://go-review.googlesource.com/c/go/+/598855
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/math/big')
| -rw-r--r-- | src/math/big/natdiv.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/math/big/natdiv.go b/src/math/big/natdiv.go index 2172eeca40..b55f9990cd 100644 --- a/src/math/big/natdiv.go +++ b/src/math/big/natdiv.go @@ -392,7 +392,7 @@ Proof that q ≤ q̂: ≥ (1/y)·((x₁ - y₁ + 1)·S - x) [above: q̂·y₁ ≥ x₁ - y₁ + 1] = (1/y)·(x₁·S - y₁·S + S - x) [distribute S] = (1/y)·(S - x₀ - y₁·S) [-x = -x₁·S - x₀] - > -y₁·S / y [x₀ < S, so S - x₀ < 0; drop it] + > -y₁·S / y [x₀ < S, so S - x₀ > 0; drop it] ≥ -1 [y₁·S ≤ y] So q̂ - q > -1. |