Pith Number

pith:O4B4B64G

pith:2019:O4B4B64GCPSGM254FSLGZL26PN

not attested not anchored not stored refs pending

Protoplanetary disk rings and gaps across ages and luminosities

(2) University of Victoria, (3) University of Hawaii, (4) NRAO Charlottesville), Astrophysics, James di Francesco (1), John Tobin (4) ((1) NRC Herzberg Astronomy, Jonathan Williams (3), Nienke van der Marel (1), Ruobing Dong (2)

arxiv:1901.03680 v2 · 2019-01-11 · 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{O4B4B64GCPSGM254FSLGZL26PN}

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	2026-05-17T23:52:38.691227Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7703c0fb8613e4666bbc2c966caf5e7b799cf4d1bb3b7875212c9214bbb37a16

Aliases

arxiv: 1901.03680 · arxiv_version: 1901.03680v2 · doi: 10.48550/arxiv.1901.03680 · pith_short_12: O4B4B64GCPSG · pith_short_16: O4B4B64GCPSGM254 · pith_short_8: O4B4B64G

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/O4B4B64GCPSGM254FSLGZL26PN \
  | 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: 7703c0fb8613e4666bbc2c966caf5e7b799cf4d1bb3b7875212c9214bbb37a16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cecf8819911803be171e8ed982f93e9f5e57982f10cd769e63f8d0aa7f2417a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-01-11T18:27:54Z",
    "title_canon_sha256": "adf0608a187bd4ff2dd44a445d4ce34b67767f515e77061abdbc642ccc50af14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03680",
    "kind": "arxiv",
    "version": 2
  }
}