Pith Number

pith:5V3APTYI

pith:2021:5V3APTYIIG7YKJZCVAOSKP2FLG

not attested not anchored not stored refs pending

On the low ortho-to-para H2 ratio in star-forming filaments

Alessandro Lupi, Stefano Bovino, Tommaso Grassi

arxiv:2109.02655 v2 · 2021-09-06 · 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{5V3APTYIIG7YKJZCVAOSKP2FLG}

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	2026-07-05T03:45:42.467218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed7607cf0841bf852722a81d253f45598c66721a7706233ec91ba07591273371

Aliases

arxiv: 2109.02655 · arxiv_version: 2109.02655v2 · doi: 10.48550/arxiv.2109.02655 · pith_short_12: 5V3APTYIIG7Y · pith_short_16: 5V3APTYIIG7YKJZC · pith_short_8: 5V3APTYI

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/5V3APTYIIG7YKJZCVAOSKP2FLG \
  | 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: ed7607cf0841bf852722a81d253f45598c66721a7706233ec91ba07591273371

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "647e3578f85de3bb4ac37b2a36b41160205ea2136919782962236ee0356a05a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-09-06T18:00:02Z",
    "title_canon_sha256": "6d54e64f05533200530032e41ee6eb60848964cb5e95ae8637d072f074b0f56d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.02655",
    "kind": "arxiv",
    "version": 2
  }
}