Pith Number

pith:U454A6FX

pith:2017:U454A6FXMDMXF6TMZX4S4N4LCF

not attested not anchored not stored refs pending

Self-shielding of hydrogen in the IGM during the epoch of reionization

Girish Kulkarni (Cambridge), Jonathan Chardin (Cambridge), Martin G. Haehnelt (Cambridge)

arxiv:1707.06993 v2 · 2017-07-21 · 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{U454A6FXMDMXF6TMZX4S4N4LCF}

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	2026-05-18T00:13:32.281239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a73bc078b760d972fa6ccdf92e378b1144906482906195a8e33289d99b89c74a

Aliases

arxiv: 1707.06993 · arxiv_version: 1707.06993v2 · doi: 10.48550/arxiv.1707.06993 · pith_short_12: U454A6FXMDMX · pith_short_16: U454A6FXMDMXF6TM · pith_short_8: U454A6FX

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/U454A6FXMDMXF6TMZX4S4N4LCF \
  | 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: a73bc078b760d972fa6ccdf92e378b1144906482906195a8e33289d99b89c74a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7c237b8b45c52045fb059f83f999997fbecd32d60690065c24d30db48f91338",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2017-07-21T17:59:59Z",
    "title_canon_sha256": "9e7c5263c98cbe09d50745cd653fffd72a2756d661287406ace4d9a751b887d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.06993",
    "kind": "arxiv",
    "version": 2
  }
}