Pith Number

pith:OF6ZNN6I

pith:1996:OF6ZNN6IAWXRPBWSLL5JT4RJEQ

not attested not anchored not stored refs pending

Evolution of the Ionizing Background at High Redshifts

Andrew Cooke, Bob Carswell, Brian Espey

arxiv:astro-ph/9609100 v1 · 1996-09-16 · 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{OF6ZNN6IAWXRPBWSLL5JT4RJEQ}

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	2026-05-18T01:40:19.265116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

717d96b7c805af1786d25afa99f229240133f29f505d3581ed287d03536749ef

Aliases

arxiv: astro-ph/9609100 · arxiv_version: astro-ph/9609100v1 · doi: 10.48550/arxiv.astro-ph/9609100 · pith_short_12: OF6ZNN6IAWXR · pith_short_16: OF6ZNN6IAWXRPBWS · pith_short_8: OF6ZNN6I

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/OF6ZNN6IAWXRPBWSLL5JT4RJEQ \
  | 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: 717d96b7c805af1786d25afa99f229240133f29f505d3581ed287d03536749ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45bde7c3a53f7d0a7fef2b03e5cf99b0f101b02c5d3ae7155bb8a83d6276d985",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-09-16T10:54:41Z",
    "title_canon_sha256": "43f55617eaa6cc2defbad7438022c6fdf4cad36da045d0517e6eacc68d801d33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9609100",
    "kind": "arxiv",
    "version": 1
  }
}