Pith Number

pith:Y4H5U4QK

pith:2005:Y4H5U4QKQJ5OXTDPZW33MQY6QJ

not attested not anchored not stored refs pending

Estimating the Porosity of the Interstellar Medium from Three-Dimensional Photoionization Modeling of H II Regions

Greg Madsen, John Mathis, Kenneth Wood, L.M. Haffner, R.J. Reynolds

arxiv:astro-ph/0506340 v1 · 2005-06-15 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y4H5U4QKQJ5OXTDPZW33MQY6QJ}

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	2026-05-18T04:27:04.265597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c70fda720a827aebcc6fcdb7b6431e8253174225ff73099d1de6bc1628a0016d

Aliases

arxiv: astro-ph/0506340 · arxiv_version: astro-ph/0506340v1 · doi: 10.48550/arxiv.astro-ph/0506340 · pith_short_12: Y4H5U4QKQJ5O · pith_short_16: Y4H5U4QKQJ5OXTDP · pith_short_8: Y4H5U4QK

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/Y4H5U4QKQJ5OXTDPZW33MQY6QJ \
  | 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: c70fda720a827aebcc6fcdb7b6431e8253174225ff73099d1de6bc1628a0016d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "694baaed785fc6d1a240cb69eba80449e5be873b16194ce7fb07a7c58917ed54",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-06-15T12:01:23Z",
    "title_canon_sha256": "bec823e74c775c79bb5d8a4b1b7dbdfd97429fad8b2e210bc3660df46f1ed435"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0506340",
    "kind": "arxiv",
    "version": 1
  }
}