Pith Number

pith:3O6M4BEK

pith:2015:3O6M4BEKVCIL6MXAMTZMWREQ5A

not attested not anchored not stored refs pending

Implication of Spatial and Temporal Variations of the Fine-Structure Constant

Mu-Lin Yan, Sze-Shiang Feng

arxiv:1504.02050 v1 · 2015-01-09 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3O6M4BEKVCIL6MXAMTZMWREQ5A}

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	2026-05-18T01:34:23.675361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbbcce048aa890bf32e064f2cb4490e80329c86b6c50863e2014e528253ac40c

Aliases

arxiv: 1504.02050 · arxiv_version: 1504.02050v1 · doi: 10.48550/arxiv.1504.02050 · pith_short_12: 3O6M4BEKVCIL · pith_short_16: 3O6M4BEKVCIL6MXA · pith_short_8: 3O6M4BEK

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/3O6M4BEKVCIL6MXAMTZMWREQ5A \
  | 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: dbbcce048aa890bf32e064f2cb4490e80329c86b6c50863e2014e528253ac40c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03d27a8e61231984ef7dcfc440e35cab74f1a66debbddbeaf573fb32886d6818",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2015-01-09T08:19:06Z",
    "title_canon_sha256": "93a39bfbad09a1fe39fa62f434219c275b9a2375fdf61514a90f17421ea99ab4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02050",
    "kind": "arxiv",
    "version": 1
  }
}