Pith Number

pith:IUPQJ3ID

pith:2012:IUPQJ3IDJARKRPELNGLOPSAUVC

not attested not anchored not stored refs pending

L'Equazione del Tempo

Costantino Sigismondi

arxiv:1211.2755 v1 · 2012-11-12 · astro-ph.IM · 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{IUPQJ3IDJARKRPELNGLOPSAUVC}

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	2026-05-18T03:41:01.867261Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

451f04ed034822a8bc8b6996e7c814a8817a047956d6497808a331a4a931bf56

Aliases

arxiv: 1211.2755 · arxiv_version: 1211.2755v1 · doi: 10.48550/arxiv.1211.2755 · pith_short_12: IUPQJ3IDJARK · pith_short_16: IUPQJ3IDJARKRPEL · pith_short_8: IUPQJ3ID

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/IUPQJ3IDJARKRPELNGLOPSAUVC \
  | 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: 451f04ed034822a8bc8b6996e7c814a8817a047956d6497808a331a4a931bf56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "faf6f7fc46481b3a7a357644c665e771e1f614cf0ca5faa68a4a08fc1a05b5ee",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-11-12T19:50:42Z",
    "title_canon_sha256": "5779a5d3eb3a0da93b49fde0b981100a4bebfb5ffac5f047c613545f177ff40b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2755",
    "kind": "arxiv",
    "version": 1
  }
}