Pith Number

pith:CND7DI2D

pith:2026:CND7DI2DCDBK2FRKURIR6F5KE5

not attested not anchored not stored refs pending

Extra-Merge: Tracing the Rank-1 Subspace of Model Merging in Language Model Pre-Training

Bohan Wang, Chenxi Jia, Hongtao Zhang, Wei Chen, Wenjie Zhou, Xueqi Cheng

arxiv:2605.26484 v1 · 2026-05-26 · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CND7DI2DCDBK2FRKURIR6F5KE5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-27T01:05:20.639643Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1347f1a34310c2ad162aa4511f17aa27542cb1d60ae3a032a6e9972dd855988c

Aliases

arxiv: 2605.26484 · arxiv_version: 2605.26484v1 · doi: 10.48550/arxiv.2605.26484 · pith_short_12: CND7DI2DCDBK · pith_short_16: CND7DI2DCDBK2FRK · pith_short_8: CND7DI2D

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/CND7DI2DCDBK2FRKURIR6F5KE5 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 1347f1a34310c2ad162aa4511f17aa27542cb1d60ae3a032a6e9972dd855988c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1877203c180f67f281e97407f3551776c6fc94c7f2b7b021fd851074d74d739a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-05-26T02:48:34Z",
    "title_canon_sha256": "1edf592ebe906467095d72d2b7e18b924eb32d1cda3e777836f32e2f2e7c9feb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.26484",
    "kind": "arxiv",
    "version": 1
  }
}