Pith Number

pith:XKHVT3RS

pith:2012:XKHVT3RSADFBTPF3NKR6L2JFVU

not attested not anchored not stored refs pending

Ion clock and search for the variation of the fine structure constant using optical transitions in Nd$^{13+}$ and Sm$^{15+}$

A. Derevianko, V.A. Dzuba, V. V. Flambaum

arxiv:1208.4157 v1 · 2012-08-21 · 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{XKHVT3RSADFBTPF3NKR6L2JFVU}

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	2026-05-18T01:55:08.950336Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba8f59ee3200ca19bcbb6aa3e5e925ad03a84eb595beba83cd41a787a230a057

Aliases

arxiv: 1208.4157 · arxiv_version: 1208.4157v1 · doi: 10.48550/arxiv.1208.4157 · pith_short_12: XKHVT3RSADFB · pith_short_16: XKHVT3RSADFBTPF3 · pith_short_8: XKHVT3RS

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/XKHVT3RSADFBTPF3NKR6L2JFVU \
  | 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: ba8f59ee3200ca19bcbb6aa3e5e925ad03a84eb595beba83cd41a787a230a057

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce25ec87604bb7e4413259244625bc98a865b6f6a4efc50d4315f42baad292c8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2012-08-21T01:23:51Z",
    "title_canon_sha256": "48169e623a3900967207bba0bd9fd4176d5acafd216d49976af298e1a15b10cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.4157",
    "kind": "arxiv",
    "version": 1
  }
}