From 4e8b394ce236fa44099b519238e47f684c1c1a55 Mon Sep 17 00:00:00 2001
From: Orion Yeung <11580988+YeungOnion@users.noreply.github.com>
Date: Tue, 22 Sep 2026 22:49:30 -0500
Subject: [PATCH 1/2] chore: release v0.20.0

---
 CHANGELOG.md | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml   |  2 +-
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2e01efc0..c0050dd3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,59 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.20.0](https://github.com/statrs-dev/statrs/compare/v0.19.1...v0.20.0) - 2026-09-23
+
+### Added
+
+- Support alloc-backed APIs in no_std ([#403](https://github.com/statrs-dev/statrs/pull/403))
+
+### Fixed
+
+- sample Gumbel via -ln(U), not ln(-U)
+- return None from Empirical::variance for a single sample
+- Triangular::pdf returns NaN when mode equals min
+- Finish large beta edge handling
+- Preserve asymmetric beta tails
+- Preserve beta values near one
+- Handle extreme beta tails
+- Handle beta log boundaries
+- Stabilize large beta CDF
+- ensure special cases evaluate only for exact inputs
+- ULPs comparisons should only regard ULPs in prec module
+- guard LogNormal::pdf on both ends and fix ln_pdf for extreme x
+- keep the left tail of LogNormal::pdf
+- Preserve gamma PDF accuracy
+- use frexp for evaluating ln(a*b)
+- preserve NaN for Gamma pdf(0) when rate is infinite
+- Stabilize gamma PDF evaluation
+- restore full precision to erf's interval constants
+- Update kdtree and KDE radius
+- accumulate central moments relative to the first observation
+- compute FisherSnedecor pdf in log space for large freedoms
+- Unblock release-plz
+- make Geometric cdf(1)/inverse_cdf(p) exact and portable
+- correct Geometric::inverse_cdf against its definition
+- compute Hypergeometric pmf in log space for large populations
+
+### Other
+
+- [autofix.ci] apply automated fixes
+- Handle p=1 in NegativeBinomial::ln_pmf like Binomial
+- Fixed broken Wikipedia link and changed link so it doesn't necessarily default to English
+- Cut the doc note too
+- Drop the explanatory comments and split out the endpoint tests
+- Allow beta tail rounding
+- update prec ULPs docs for clarity around use case
+- Assert directly in test_pdf_left_tail instead of collecting failures
+- Cover frexp edge cases
+- *(gamma)* small suite for rate*x near 1 cases
+- *(doc)* clippy
+- *(online)* guidance/suggestion for `merge`
+- build the OnlineMoments offset tests under no_std
+- Source large-freedom pdf fixtures from mpmath instead of SciPy
+- *(deps)* bump actions/checkout from 4 to 7
+- drop overexplanation implementation
+
 ## [0.19.1](https://github.com/statrs-dev/statrs/compare/v0.19.0...v0.19.1) - 2026-08-11
 
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index 6e3fd32e..60a2e409 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "statrs"
-version = "0.19.1"
+version = "0.20.0"
 authors = ["Michael Ma"]
 description = "Statistical computing library for Rust"
 license = "MIT"

From a85b2bd3a4e539ddf8d6c8d13bb1b3fb38f56f4e Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Wed, 23 Sep 2026 03:49:53 +0000
Subject: [PATCH 2/2] chore: update MSRV lockfile

---
 Cargo.lock.MSRV | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Cargo.lock.MSRV b/Cargo.lock.MSRV
index 9faa9327..a975388e 100644
--- a/Cargo.lock.MSRV
+++ b/Cargo.lock.MSRV
@@ -709,7 +709,7 @@ checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
 
 [[package]]
 name = "statrs"
-version = "0.19.1"
+version = "0.20.0"
 dependencies = [
  "anyhow",
  "approx",