Pith Number

pith:MUPJETFZ

pith:2015:MUPJETFZZH3EB2D2MY2N3RKLSQ

not attested not anchored not stored refs pending

Young astronomer in Denmark 1946 to 1958

Erik H{\o}g

arxiv:1512.01924 v2 · 2015-12-07 · physics.hist-ph · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MUPJETFZZH3EB2D2MY2N3RKLSQ}

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	2026-05-18T00:38:44.189737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

651e924cb9c9f640e87a6634ddc54b941c8e1a1afb1721623644d01e4f8f48e9

Aliases

arxiv: 1512.01924 · arxiv_version: 1512.01924v2 · doi: 10.48550/arxiv.1512.01924 · pith_short_12: MUPJETFZZH3E · pith_short_16: MUPJETFZZH3EB2D2 · pith_short_8: MUPJETFZ

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/MUPJETFZZH3EB2D2MY2N3RKLSQ \
  | 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: 651e924cb9c9f640e87a6634ddc54b941c8e1a1afb1721623644d01e4f8f48e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63777197ae4b289ba9751cec77167583751ff11c409ff778e1c45649727ecba5",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2015-12-07T06:17:23Z",
    "title_canon_sha256": "5c127eb9b74b99c476c11b2822c7d523c1d8c393f375bb090eccfc10325b8979"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.01924",
    "kind": "arxiv",
    "version": 2
  }
}