Pith Number

pith:VT2IGUVK

pith:2019:VT2IGUVKLXZL7ENCRJZ4TGVQKM

not attested not anchored not stored refs pending

Rapid and efficient mass collection by a supersonic cloud-cloud collision as a major mechanism of high-mass star formation

Kazufumi Torii, Takahiro Hayakawa, Tsuyoshi Inoue, Yasuo Fukui

arxiv:1909.08202 v4 · 2019-09-18 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VT2IGUVKLXZL7ENCRJZ4TGVQKM}

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	2026-07-05T01:30:21.942197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

acf48352aa5df2bf91a28a73c99ab05338ba324932b5091f1fe85fbaa7d0b766

Aliases

arxiv: 1909.08202 · arxiv_version: 1909.08202v4 · doi: 10.48550/arxiv.1909.08202 · pith_short_12: VT2IGUVKLXZL · pith_short_16: VT2IGUVKLXZL7ENC · pith_short_8: VT2IGUVK

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/VT2IGUVKLXZL7ENCRJZ4TGVQKM \
  | 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: acf48352aa5df2bf91a28a73c99ab05338ba324932b5091f1fe85fbaa7d0b766

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ab8274e0417bacbd5165546642089f10d5c88a676d9172b9cbc28b7ef9b1ac1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-09-18T04:02:57Z",
    "title_canon_sha256": "8aa0e2ce20fa9875654c3cede9dc31d93a4244f8c2d300292341d8031ed08a90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.08202",
    "kind": "arxiv",
    "version": 4
  }
}