From 92759d1ae8bf053963b1191ed17be7cf2d07ef6f Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Thu, 15 Oct 2026 12:17:11 +0000
Subject: [PATCH] chore: bump mathlib to ba9c63d: refactor(Data): make `Set` a
 one-field structure (#41506) (2026-10-13)

---
 lake-manifest.json | 4 ++--
 lakefile.toml      | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lake-manifest.json b/lake-manifest.json
index 9158066d..4859f33a 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -5,10 +5,10 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "56a005855ea17e0b0958f73ec801ae140b0a1679",
+   "rev": "ba9c63d0fefca8bc3961f7f6e7a30ec6988a4338",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "56a005855ea17e0b0958f73ec801ae140b0a1679",
+   "inputRev": "ba9c63d0fefca8bc3961f7f6e7a30ec6988a4338",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover/verso",
diff --git a/lakefile.toml b/lakefile.toml
index 9f0109af..1b14ebff 100644
--- a/lakefile.toml
+++ b/lakefile.toml
@@ -17,7 +17,7 @@ rev = "v4.35.0-rc4"
 [[require]]
 name = "mathlib"
 scope = "leanprover-community"
-rev = "56a005855ea17e0b0958f73ec801ae140b0a1679"
+rev = "ba9c63d0fefca8bc3961f7f6e7a30ec6988a4338"
 
 [[lean_lib]]
 name = "LeanMachineLearning"