Pith Number

pith:XJKYXSQB

pith:2013:XJKYXSQBAU444WFN6NBBQC6VRD

not attested not anchored not stored refs pending

"The Waters I am Entering No One yet Has Crossed": Alexander Friedman and the Origins of Modern Cosmology

Ari Belenkiy

arxiv:1302.1498 v1 · 2013-02-06 · physics.hist-ph · 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{XJKYXSQBAU444WFN6NBBQC6VRD}

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	2026-05-18T03:34:24.100669Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba558bca010539ce58adf342180bd588eb68bf3693c8a074c96d6faa6ec85541

Aliases

arxiv: 1302.1498 · arxiv_version: 1302.1498v1 · doi: 10.48550/arxiv.1302.1498 · pith_short_12: XJKYXSQBAU44 · pith_short_16: XJKYXSQBAU444WFN · pith_short_8: XJKYXSQB

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/XJKYXSQBAU444WFN6NBBQC6VRD \
  | 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: ba558bca010539ce58adf342180bd588eb68bf3693c8a074c96d6faa6ec85541

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "629434d71d30a757f4ee2d050ff34cf720fcd37aa595465b1c3098b35af56684",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2013-02-06T20:24:49Z",
    "title_canon_sha256": "194ea82f2d0eb64dd0ee51e4cb8710b705b74cb545ef7d7b1b29c40cd6db270e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1498",
    "kind": "arxiv",
    "version": 1
  }
}