Pith Number

pith:4NFXF3ZF

pith:2019:4NFXF3ZFQQ5SNTYR6HMNCPRQBG

not attested not anchored not stored refs pending

The Interstellar Medium: The Key Component in Galactic Evolution and Modern Cosmology

Carl Heiles, Di Li, Lei Qian, Naomi McClure-Griffiths, Shu Liu

arxiv:1904.01237 v2 · 2019-04-02 · astro-ph.IM · 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{4NFXF3ZFQQ5SNTYR6HMNCPRQBG}

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	2026-05-17T23:49:24.361941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e34b72ef25843b26cf11f1d8d13e300995f635fdaaedb1e7d5bd2dbbb0098dfd

Aliases

arxiv: 1904.01237 · arxiv_version: 1904.01237v2 · doi: 10.48550/arxiv.1904.01237 · pith_short_12: 4NFXF3ZFQQ5S · pith_short_16: 4NFXF3ZFQQ5SNTYR · pith_short_8: 4NFXF3ZF

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/4NFXF3ZFQQ5SNTYR6HMNCPRQBG \
  | 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: e34b72ef25843b26cf11f1d8d13e300995f635fdaaedb1e7d5bd2dbbb0098dfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22f287fa463ef78345154d3006abc56cc76b440bcdc6b178686438a3ac670011",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-04-02T06:51:36Z",
    "title_canon_sha256": "92a5f396ba669c3c65879346ec8b8b18ea59bf486496dc6cc6a1db1493931a4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01237",
    "kind": "arxiv",
    "version": 2
  }
}