t4a-faer 0.26.0, t4a-faer-traits 0.24.2

CHANGELOG.md

@@ -1,3 +1,57 @@
+# t4a-faer 0.26.0 (tensor4all fork; with t4a-faer-traits 0.24.2)
+
+Changes since `t4a-faer` 0.25.2 (tag `faer-v0.25.2`). Numbers are tensor4all/faer issues or PRs; each change has its row in `PATCHSET.md`.
+
+## Breaking: threadteam is the only parallel route (#97)
+
+`Par::Rayon(NonZeroUsize)`, `Par::rayon(nthreads)`, `ParShape::Rayon(NonZeroUsize)` and
+`ParShape::rayon(nthreads)` are removed, together with the spindle path and the Rayon cost model.
+`Par::Seq` and `Par::Team` remain. To migrate:
+
+- a one-off parallel call: `faer::team::with_team(n, |par| { /* faer calls with par */ })` replaces
+  `Par::rayon(n)`;
+- repeated parallel work: build a `threadteam::Pool` and `Team` once and lend `Par::Team(..)` to each
+  call, `par.reborrow()` for successive calls (see "parallelism" in `README.md`);
+- a workspace query: pass `par.shape()` (or `ParShape::Seq`) where `ParShape::rayon(n)` was used.
+
+A build without the `threadteam` feature has `Par::Seq` only.
+
+## New
+
+- `faer::linalg::matmul::matmul_with_conj_uninit` and `MatUninitMut`: a matrix product into
+  `MaybeUninit<T>` storage, returned as an initialized `MatMut`; prior contents are never read
+  (#136, requested upstream as sarah-quinones/faer-rs#269).
+
+## Correctness
+
+- Nonsymmetric EVD: the input is scaled into range as `?GEEV` does (#112); the eigenvector back
+  substitution clamps relative to the eigenvalue, so residuals no longer grow with n (#112); the real
+  Schur deflation-window sort always ends (#144); the 2 x 2 block solves of the real back
+  substitution follow `?LALN2` (#145).
+- SVD: the rotation path finishes when dqds does not converge (#110); a retained Ritz pair of the
+  partial SVD carries its residual estimate through the restart (#108).
+- LU: the full-pivoting search breaks ties by column then row, independent of the SIMD width (#105, #106).
+- Products with a diagonal read the depth in either direction (#113).
+- Sparse LU reports an exact zero pivot as `LuError::NumericSingular` in both backends (#132).
+- Krylov solvers: the final residual is reported on `NoConvergence`, and BiCGSTAB stops at the last
+  finite iterate after a breakdown (#133, #134).
+
+## Parallelism and performance
+
+- Every region runs at the widest width that pays, on a sub-team of that width (#91); the team
+  dispatch cost is read from threadteam (#104).
+- No heap allocation inside a parallel region (#111).
+- Layout copies split along the destination's major dimension, first touch in parallel (#99).
+- SVD: blocked bidiagonalization, dqds shift and a padded work copy (#52).
+
+## Dependencies and toolchain
+
+- `threadteam` 0.1.3 (#107 wait fix) and `t4a-private-gemm-x86` 0.1.27 (#113).
+- MSRV is Rust 1.89 (`rust-version = "1.89.0"` in both crates).
+- AVX-512 (`x86-v4`) no longer needs the nightly compiler but stays opt-in: enable the `x86-v4`
+  feature (`nightly` is kept as its old name).
+- `t4a-faer-traits` 0.24.2 only adds `rust-version`.
+
 # 0.24
 - add missing scratch space functions for matrix-free eigen/svd solvers
 - allow sparse-dense/dense-sparse matmuls to accept both CSC and CSR matrices

PATCHSET.md

@@ -53,7 +53,7 @@ gate has changed and two kinds of adoption are now in the ledger.
 | Workspace | `faer-ffi` is excluded (the C API and its cbindgen build are unused by tensor4all). |
 | Upstream base | Synced with Codeberg `0ecd846` (2026-10-17) by a merge commit, so `upstream/main` is an ancestor of this branch. Those nine upstream commits since the previous base `ddbd2ae` (the sparse CSC example doc, `MatMut::from_row_major_slice_with_stride_mut`'s strides, the CG/BiCGSTAB uninitialized read) were written upstream by Paul and Connor Smith and had already been cherry-picked here on 2026-10-22 in `9f3dc58`, `ae9b979` and `064016e` (their messages name Codeberg #305, #326 and `1b2d9a9`; the tests `codeberg_305`/`codeberg_326` came with them). The direction is upstream to fork, not the reverse: nothing was fed back upstream. The cherry-picked content is byte-identical to upstream's, so the sync changes no file -- the merged tree hash equals the pre-merge tree hash. Later syncs record the new base here. |
 | Publication | crates.io, in the order `t4a-faer-traits` then `t4a-faer`. Releases are tagged `faer-v<faer version>` and published by hand from a clean checkout of the tag; a `v<faer version>` tag would also start `publish.yml`. A version that is already on crates.io is skipped, so a release that bumps only one crate still succeeds. |
-| Released | Latest: `t4a-faer 0.25.2` with `t4a-faer-traits 0.24.1`, published from the commit tagged `faer-v0.25.2` (see the release section at the end). The published `src/**` is byte-identical to the tagged commit, so that commit is the revision a consumer pins. A later commit needs a new version. Earlier releases carry their own `faer-v<version>` tags. |
+| Released | Latest: `t4a-faer 0.26.0` with `t4a-faer-traits 0.24.2`, published from the commit tagged `faer-v0.26.0` (see the release section at the end). The published `src/**` is byte-identical to the tagged commit, so that commit is the revision a consumer pins. A later commit needs a new version. Earlier releases carry their own `faer-v<version>` tags. |
 | LICENSE | A `LICENSE` copy lives in each crate directory so the published archive ships the MIT text (`license-file` next to `license` makes Cargo warn). |
 
 ## Experiments
@@ -260,3 +260,12 @@ merge commit of the version-bump PR, tagged `faer-v0.25.2`. The release carries
 - #83 triangular_solve: exact solves with subnormal pivots (#74).
 
 Evidence lives in each PR and its ledger row above; this release adds no code.
+
+## Released: `t4a-faer` 0.26.0 (2026-10-29)
+
+`t4a-faer` 0.26.0 with `t4a-faer-traits` 0.24.2 (only `rust-version = "1.89.0"` is new in
+`faer-traits/`). Published from the merge commit of the version-bump PR, tagged `faer-v0.26.0`, which
+also marks the `t4a-faer-traits` 0.24.2 source. The minor version moves because #97 removed
+`Par::Rayon`, `Par::rayon`, `ParShape::Rayon` and `ParShape::rayon` (`README.md`: published versions
+follow semver). `CHANGELOG.md` lists the changes since `faer-v0.25.2` and the migration; the evidence
+lives in each PR and its ledger row above. This release adds no code.

faer-traits/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "t4a-faer-traits"
-version = "0.24.1"
+version = "0.24.2"
 edition = "2021"
 rust-version = "1.89.0"
 authors = ["sarah quiñones <sarah@veganb.tw>"]

faer/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "t4a-faer"
-version = "0.25.2"
+version = "0.26.0"
 edition = "2021"
 authors = ["sarah quiñones <sarah@veganb.tw>"]
 description = "Temporary tensor4all fork of faer: an AI-driven experiment build for tenferro-rs."
@@ -37,7 +37,7 @@ dyn-stack = { version = "0.13.2", default-features = false, features = ["core-er
 pulp = { version = "0.22.2", default-features = false, features = ["x86-v3"] }
 equator = { version = "0.6.0" }
 
-faer-traits = { package = "t4a-faer-traits", path = "../faer-traits", version = "0.24.1", default-features = false }
+faer-traits = { package = "t4a-faer-traits", path = "../faer-traits", version = "0.24.2", default-features = false }
 
 gemm = { version = "0.19.0", default-features = false }
 nano-gemm = { version = "0.2.2", default-features = false }