Pith Number

pith:I5FZFY52

pith:2018:I5FZFY52XU43X5BUSIFCQUNTNN

not attested not anchored not stored refs pending

Schroedinger's code: A preliminary study on research source code availability and link persistence in astrophysics

Alice Allen, Peter J. Teuben, P. Wesley Ryan

arxiv:1801.02094 v2 · 2018-01-06 · astro-ph.IM · cs.DL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I5FZFY52XU43X5BUSIFCQUNTNN}

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	2026-05-18T00:15:18.899416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

474b92e3babd39bbf434920a2851b36b78b728b439b4552eb94c9f76eaf88435

Aliases

arxiv: 1801.02094 · arxiv_version: 1801.02094v2 · doi: 10.48550/arxiv.1801.02094 · pith_short_12: I5FZFY52XU43 · pith_short_16: I5FZFY52XU43X5BU · pith_short_8: I5FZFY52

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/I5FZFY52XU43X5BUSIFCQUNTNN \
  | 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: 474b92e3babd39bbf434920a2851b36b78b728b439b4552eb94c9f76eaf88435

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5127c8c9eb6ff472ed9a5084f1dec1fdf7d634b9ffc7529a7e2cdd98ebd84d1",
    "cross_cats_sorted": [
      "cs.DL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-01-06T21:27:32Z",
    "title_canon_sha256": "b163b0f859e0bb97eddec2659e26289f7b45c2142af136590d9115d75178bb67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02094",
    "kind": "arxiv",
    "version": 2
  }
}