Pith Number

pith:LLZNGO2V

pith:2013:LLZNGO2V2FDXBB7FFMZXOHWSKT

not attested not anchored not stored refs pending

On the Evolution of the Cosmic Ionizing Background

2, (2) Institute for Theoretical Physics - Heidelberg University, 3), (3) INAF - Astronomical Observatory of Trieste, 4), (4) INFN - National Institute for Nuclear Physics, (5) INAF - Astronomical Observatory of Bologna, Christoph Pfrommer (1), Eros Vanzella (5) ((1) HITS - Heidelberg Institute for Theoretical Studies, Fabio Fontanot (1, Germany, Guido Cupani (3), Italy, Italy), Stefano Cristiani (3

arxiv:1312.0615 v1 · 2013-12-02 · 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{LLZNGO2V2FDXBB7FFMZXOHWSKT}

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	2026-05-18T01:45:59.618240Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5af2d33b55d1477087e52b33771ed254e7295ac6679df32d0cb458eef7acb3c8

Aliases

arxiv: 1312.0615 · arxiv_version: 1312.0615v1 · doi: 10.48550/arxiv.1312.0615 · pith_short_12: LLZNGO2V2FDX · pith_short_16: LLZNGO2V2FDXBB7F · pith_short_8: LLZNGO2V

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/LLZNGO2V2FDXBB7FFMZXOHWSKT \
  | 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: 5af2d33b55d1477087e52b33771ed254e7295ac6679df32d0cb458eef7acb3c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e04bb8130236aa98d300b649e13e3be252e79298cb9bb7be4b587759a53a9e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-12-02T21:00:21Z",
    "title_canon_sha256": "f24bbbc2114a3e68cfebc73ba90de91343cfdb968dca94adc757813d483dccd4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.0615",
    "kind": "arxiv",
    "version": 1
  }
}