Pith Number

pith:LKIVBEQU

pith:2019:LKIVBEQUQCUDNMAMEZ5YLQ2G6P

not attested not anchored not stored refs pending

Development of Hydrogen and Helium Proximity Zones around Quasars

A. Meiksin, D. Syphers, W. Zheng

arxiv:1908.04691 v1 · 2019-08-13 · astro-ph.GA · 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{LKIVBEQUQCUDNMAMEZ5YLQ2G6P}

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	2026-07-05T00:08:36.887677Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a9150921480a836b00c267b85c346f3c858bc9cc0af6e7be337a0fd97f61a91

Aliases

arxiv: 1908.04691 · arxiv_version: 1908.04691v1 · doi: 10.48550/arxiv.1908.04691 · pith_short_12: LKIVBEQUQCUD · pith_short_16: LKIVBEQUQCUDNMAM · pith_short_8: LKIVBEQU

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/LKIVBEQUQCUDNMAMEZ5YLQ2G6P \
  | 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: 5a9150921480a836b00c267b85c346f3c858bc9cc0af6e7be337a0fd97f61a91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8b90cdce9e01e611730daff34a11ae41f442f7f60506a178a6470af1f55b82a",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-08-13T15:01:03Z",
    "title_canon_sha256": "0ce7605bcd656c5215ade1cc1db60bd433680e30593633d722340d15414d06d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.04691",
    "kind": "arxiv",
    "version": 1
  }
}