Pith Number

pith:IVYCB4A2

pith:2012:IVYCB4A2XOD3DD53GVRWCALVRD

not attested not anchored not stored refs pending

A Note on Solar Cycle Length during the Medieval Climate Anomaly

J. M. Vaquero, R. M. Trigo

arxiv:1203.1073 v1 · 2012-03-05 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IVYCB4A2XOD3DD53GVRWCALVRD}

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	2026-05-18T01:58:14.562757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

457020f01abb87b18fbb356361017588c5066742a0664e069c5806d56b47f72b

Aliases

arxiv: 1203.1073 · arxiv_version: 1203.1073v1 · doi: 10.48550/arxiv.1203.1073 · pith_short_12: IVYCB4A2XOD3 · pith_short_16: IVYCB4A2XOD3DD53 · pith_short_8: IVYCB4A2

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/IVYCB4A2XOD3DD53GVRWCALVRD \
  | 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: 457020f01abb87b18fbb356361017588c5066742a0664e069c5806d56b47f72b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ad75e16b32fd25b662e59bf7379ad6d91507fe098c901171a0459bf358ce326",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-03-05T23:19:44Z",
    "title_canon_sha256": "60038a408a691797c25f65db2900b601a6c01820a66e57a61ce776e30db8f05a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.1073",
    "kind": "arxiv",
    "version": 1
  }
}