Pith Number

pith:GJFGA5T3

pith:2018:GJFGA5T37SEMY3H7LNBE5RBHWX

not attested not anchored not stored refs pending

X-ray ionization of the intergalactic medium by quasars

B. Ciardi, Luca Graziani, M. Glatzle

arxiv:1805.11615 v1 · 2018-05-29 · astro-ph.CO · astro-ph.GA · physics.atom-ph · physics.comp-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{GJFGA5T37SEMY3H7LNBE5RBHWX}

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	2026-05-17T23:56:53.315579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

324a60767bfc88cc6cff5b424ec427b5e3f85db7905b465356b8c3d2d504830e

Aliases

arxiv: 1805.11615 · arxiv_version: 1805.11615v1 · doi: 10.48550/arxiv.1805.11615 · pith_short_12: GJFGA5T37SEM · pith_short_16: GJFGA5T37SEMY3H7 · pith_short_8: GJFGA5T3

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/GJFGA5T37SEMY3H7LNBE5RBHWX \
  | 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: 324a60767bfc88cc6cff5b424ec427b5e3f85db7905b465356b8c3d2d504830e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bda11d1b76d116312cf868059c4bb0f15d8aad00d9ec3277f05bfebf3cc4b21",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "physics.atom-ph",
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2018-05-29T17:59:16Z",
    "title_canon_sha256": "8efd02e7a273a6d8a8c5da00b77ec0035b6461def63a236e1a5bdbd12a5380a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.11615",
    "kind": "arxiv",
    "version": 1
  }
}