Pith Number

pith:O4AOUACZ

pith:2012:O4AOUACZMLTRFIIZA55YXNP3ZE

not attested not anchored not stored refs pending

Relational Foundations For Functorial Data Migration

David I. Spivak, Ryan Wisnesky

arxiv:1212.5303 v7 · 2012-12-20 · cs.DB · math.CT · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O4AOUACZMLTRFIIZA55YXNP3ZE}

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	2026-05-18T01:36:21.177640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7700ea005962e712a119077b8bb5fbc9200f0e47e23c257a9c6218a632bdb598

Aliases

arxiv: 1212.5303 · arxiv_version: 1212.5303v7 · doi: 10.48550/arxiv.1212.5303 · pith_short_12: O4AOUACZMLTR · pith_short_16: O4AOUACZMLTRFIIZ · pith_short_8: O4AOUACZ

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/O4AOUACZMLTRFIIZA55YXNP3ZE \
  | 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: 7700ea005962e712a119077b8bb5fbc9200f0e47e23c257a9c6218a632bdb598

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff830eb32a770d24e4d1eb4b12c550db1810aed8864fd14cb7e7448cdca53ed7",
    "cross_cats_sorted": [
      "math.CT",
      "math.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2012-12-20T23:58:26Z",
    "title_canon_sha256": "b1381c6813e39bfa444af40fc2f56de408d8e0f2c7904a7eef1d3758c0d41493"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5303",
    "kind": "arxiv",
    "version": 7
  }
}