Pith Number

pith:QXGDAEB7

pith:2018:QXGDAEB7IQNAK42TOSA66G3V6I

not attested not anchored not stored refs pending

A homogeneous aa index: 1. Secular variation

Aude Chambodut, Ellen Clarke, Luke A. Barnard, Mathew J. Owens, Mike Lockwood, V\'eronique Mendel

arxiv:1811.09810 v2 · 2018-11-24 · astro-ph.SR · physics.space-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{QXGDAEB7IQNAK42TOSA66G3V6I}

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	2026-05-17T23:58:13.377819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85cc30103f441a0573537481ef1b75f21d957a9ba0ce998ec71eb162acfb735f

Aliases

arxiv: 1811.09810 · arxiv_version: 1811.09810v2 · doi: 10.48550/arxiv.1811.09810 · pith_short_12: QXGDAEB7IQNA · pith_short_16: QXGDAEB7IQNAK42T · pith_short_8: QXGDAEB7

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/QXGDAEB7IQNAK42TOSA66G3V6I \
  | 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: 85cc30103f441a0573537481ef1b75f21d957a9ba0ce998ec71eb162acfb735f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7917c888bc016eccfd6093adc95516307dbb273d1d3c465e20dd662c5f38ede",
    "cross_cats_sorted": [
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-11-24T10:55:25Z",
    "title_canon_sha256": "0cdeeae1add15140660a6c8f1933dc68134f48dc305fd687a3f21406fecacddb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.09810",
    "kind": "arxiv",
    "version": 2
  }
}