Pith Number

pith:PKTMZSD3

pith:2000:PKTMZSD36PSRMF4ZHDX3IAWICZ

not attested not anchored not stored refs pending

Relativistic effects in Ni II and the search for variation of the fine structure constant

J. K. Webb (UNSW), M. T. Murphy (UNSW), V. A. Dzuba (UNSW), V. V. Flambaum (UNSW)

arxiv:astro-ph/0012422 v2 · 2000-12-20 · astro-ph · physics.atom-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PKTMZSD36PSRMF4ZHDX3IAWICZ}

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	2026-07-04T15:48:02.150998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7aa6ccc87bf3e516179938efb402c8164b59d8b2b26eb485ba4b992bdcbfd0e9

Aliases

arxiv: astro-ph/0012422 · arxiv_version: astro-ph/0012422v2 · doi: 10.48550/arxiv.astro-ph/0012422 · pith_short_12: PKTMZSD36PSR · pith_short_16: PKTMZSD36PSRMF4Z · pith_short_8: PKTMZSD3

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/PKTMZSD36PSRMF4ZHDX3IAWICZ \
  | 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: 7aa6ccc87bf3e516179938efb402c8164b59d8b2b26eb485ba4b992bdcbfd0e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17ec2c0838f22111329177b2a2da7a26fdb8cc49dc998d2434d856c7f208e331",
    "cross_cats_sorted": [
      "physics.atom-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-12-20T06:26:42Z",
    "title_canon_sha256": "902d03eeb02fae51709a8466f69d9e35cf897c2f9607c75169fe5d4976a0d5a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0012422",
    "kind": "arxiv",
    "version": 2
  }
}