Pith Number

pith:WWXKPQRM

pith:2015:WWXKPQRMYKIK2NQUJ26OGALYZ4

not attested not anchored not stored refs pending

Star Formation triggered by cloud-cloud collisions

A. P. Whitworth, D. A. Hubber, S. E. Jaffa, S. K. Balfour

arxiv:1509.05287 v1 · 2015-09-17 · astro-ph.SR · 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{WWXKPQRMYKIK2NQUJ26OGALYZ4}

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	2026-05-18T01:32:44.228763Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b5aea7c22cc290ad36144ebce30178cf087f0bf65b62bc503a99648b66160fc9

Aliases

arxiv: 1509.05287 · arxiv_version: 1509.05287v1 · doi: 10.48550/arxiv.1509.05287 · pith_short_12: WWXKPQRMYKIK · pith_short_16: WWXKPQRMYKIK2NQU · pith_short_8: WWXKPQRM

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/WWXKPQRMYKIK2NQUJ26OGALYZ4 \
  | 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: b5aea7c22cc290ad36144ebce30178cf087f0bf65b62bc503a99648b66160fc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0450f706e87c3d8f863426092b926abe76717f54d9f5368f3d86cffcbf47923a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-09-17T15:18:54Z",
    "title_canon_sha256": "b02acdf18a64b51bad5d57b7564de1c721f510280e8eaa6d1a298c2c58ed63c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.05287",
    "kind": "arxiv",
    "version": 1
  }
}