Pith Number

pith:QEWWUI6C

pith:2011:QEWWUI6CMMXX3RSWR6PWG5I3SA

not attested not anchored not stored refs pending

Spreading the gospel: The Bohr atom popularised

Helge Kragh, Kristian Hvidtfelt Nielsen

arxiv:1112.2499 v1 · 2011-12-12 · physics.hist-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{QEWWUI6CMMXX3RSWR6PWG5I3SA}

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	2026-05-18T04:06:34.167647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

812d6a23c2632f7dc6568f9f63751b902930a2237aeb872de6325e8e422e24de

Aliases

arxiv: 1112.2499 · arxiv_version: 1112.2499v1 · doi: 10.48550/arxiv.1112.2499 · pith_short_12: QEWWUI6CMMXX · pith_short_16: QEWWUI6CMMXX3RSW · pith_short_8: QEWWUI6C

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/QEWWUI6CMMXX3RSWR6PWG5I3SA \
  | 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: 812d6a23c2632f7dc6568f9f63751b902930a2237aeb872de6325e8e422e24de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f9b39464d501285232afc328a5e498dba99ebd139021e5f279b78228a04b40b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2011-12-12T10:26:34Z",
    "title_canon_sha256": "39bb943315d70d612717f1e7957eab02c1a001afbd577e6373a1d2b4387285d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2499",
    "kind": "arxiv",
    "version": 1
  }
}