Pith Number

pith:AZ3XUAT5

pith:2018:AZ3XUAT57UDZL4OKXQVHQDLI4L

not attested not anchored not stored refs pending

TRAPPIST-1e Has a Large Iron Core

David Kipping, Gabrielle Suissa

arxiv:1804.10618 v1 · 2018-04-26 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AZ3XUAT57UDZL4OKXQVHQDLI4L}

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	2026-05-18T00:17:16.079854Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06777a027dfd0795f1cabc2a780d68e2c40a7b24d8a3ef11b4d707abadb81dbb

Aliases

arxiv: 1804.10618 · arxiv_version: 1804.10618v1 · doi: 10.48550/arxiv.1804.10618 · pith_short_12: AZ3XUAT57UDZ · pith_short_16: AZ3XUAT57UDZL4OK · pith_short_8: AZ3XUAT5

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/AZ3XUAT57UDZL4OKXQVHQDLI4L \
  | 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: 06777a027dfd0795f1cabc2a780d68e2c40a7b24d8a3ef11b4d707abadb81dbb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b45bf058e8b45c5938831028c3e5ed71b9eeb103168bc520f0ed5a14c5eee1d6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-04-26T18:05:00Z",
    "title_canon_sha256": "99e2b1dcc72574ea57249bcc17145d0bf8a65751478e961b816f7da0b6c87d51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10618",
    "kind": "arxiv",
    "version": 1
  }
}