Pith Number

pith:QKMRIGSG

pith:2020:QKMRIGSG5MSBJJLHNH3Y6ZP4U6

not attested not anchored not stored refs pending

TW Hya: an old protoplanetary disc revived by its planet

Allona Vazan, Cassandra Hall, Farzana Meru, Jack Humphries, Olja Panic, Patrick Neunteufel, Ravit Helled, Sergei Nayakshin, Takashi Tsukagoshi

arxiv:2004.10094 v2 · 2020-04-21 · astro-ph.EP · 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{QKMRIGSG5MSBJJLHNH3Y6ZP4U6}

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	2026-07-05T01:02:46.465170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8299141a46eb2414a56769f78f65fca7953d46eaca351e69311d701a0b8a6b51

Aliases

arxiv: 2004.10094 · arxiv_version: 2004.10094v2 · doi: 10.48550/arxiv.2004.10094 · pith_short_12: QKMRIGSG5MSB · pith_short_16: QKMRIGSG5MSBJJLH · pith_short_8: QKMRIGSG

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/QKMRIGSG5MSBJJLHNH3Y6ZP4U6 \
  | 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: 8299141a46eb2414a56769f78f65fca7953d46eaca351e69311d701a0b8a6b51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1030e05726ce13653d1f5919d7d952be32bba598194d6a254b2a2de4fba061b2",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2020-04-21T15:16:27Z",
    "title_canon_sha256": "d24c9ab6ec75a92804d079b68c22198c972eb117fc9b559296b2dda67557c3c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.10094",
    "kind": "arxiv",
    "version": 2
  }
}