Pith Number

pith:YB4O6EX4

pith:2012:YB4O6EX4CKC3Y5C7HLWZWQOSF6

not attested not anchored not stored refs pending

The Effect of Fluctuations on the Helium-Ionizing Background

Frederick B. Davies, Steven R. Furlanetto

arxiv:1209.4900 v2 · 2012-09-21 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YB4O6EX4CKC3Y5C7HLWZWQOSF6}

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	2026-05-18T01:54:20.018007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c078ef12fc1285bc745f3aed9b41d22fab7991fcbd11a1d88ca26896b2aca23d

Aliases

arxiv: 1209.4900 · arxiv_version: 1209.4900v2 · doi: 10.48550/arxiv.1209.4900 · pith_short_12: YB4O6EX4CKC3 · pith_short_16: YB4O6EX4CKC3Y5C7 · pith_short_8: YB4O6EX4

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/YB4O6EX4CKC3Y5C7HLWZWQOSF6 \
  | 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: c078ef12fc1285bc745f3aed9b41d22fab7991fcbd11a1d88ca26896b2aca23d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "756d8d0323fd1ff66a9c9cf8e25e4d308a15120acb75572e940b2fa01b29966d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-21T20:00:01Z",
    "title_canon_sha256": "69bf25232412fdcc1d8a4404389d850c4254f3c879780525a22c01a61c69fc73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4900",
    "kind": "arxiv",
    "version": 2
  }
}