Pith Number

pith:YREPDM3M

pith:2025:YREPDM3MON3ZW3OJI3MWZO6NFM

not attested not anchored not stored refs pending

Compact protoplanetary discs can be produced by dead zones

Richard Alexander, Simin Tong

arxiv:2502.04452 v1 · 2025-02-06 · 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{YREPDM3MON3ZW3OJI3MWZO6NFM}

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	2026-07-05T10:10:52.003026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c448f1b36c73779b6dc946d96cbbcd2b241c428e3150ac4d9ab83caf5746b679

Aliases

arxiv: 2502.04452 · arxiv_version: 2502.04452v1 · doi: 10.48550/arxiv.2502.04452 · pith_short_12: YREPDM3MON3Z · pith_short_16: YREPDM3MON3ZW3OJ · pith_short_8: YREPDM3M

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/YREPDM3MON3ZW3OJI3MWZO6NFM \
  | 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: c448f1b36c73779b6dc946d96cbbcd2b241c428e3150ac4d9ab83caf5746b679

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d57e9eb6b05d23fb888093c39d7f5c2c0ff272e41a1b9aa998d72ca23bfd6278",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2025-02-06T19:00:50Z",
    "title_canon_sha256": "650a92142242f6b53f0a36d547609dec6b00b51c27399b028ed704b43ddcdf2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.04452",
    "kind": "arxiv",
    "version": 1
  }
}