Pith Number

pith:I5X3MWLF

pith:2009:I5X3MWLFKJJIVM2WRSTCJXMVGK

not attested not anchored not stored refs pending

Specifying Data Objects with Initial Algebras

Chris Preston

arxiv:0909.3596 v1 · 2009-09-19 · cs.LO · 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{I5X3MWLFKJJIVM2WRSTCJXMVGK}

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	2026-07-04T15:50:17.270439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

476fb6596552528ab3568ca624dd9532a688f6f6f0ef1f601f1c46fdeb58fe1f

Aliases

arxiv: 0909.3596 · arxiv_version: 0909.3596v1 · doi: 10.48550/arxiv.0909.3596 · pith_short_12: I5X3MWLFKJJI · pith_short_16: I5X3MWLFKJJIVM2W · pith_short_8: I5X3MWLF

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/I5X3MWLFKJJIVM2WRSTCJXMVGK \
  | 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: 476fb6596552528ab3568ca624dd9532a688f6f6f0ef1f601f1c46fdeb58fe1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5655a8be9d98e5cfa54e9a07b83269c2fab775cc455e6013edd8b68d47a5af0b",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2009-09-19T16:59:18Z",
    "title_canon_sha256": "4f53ead28e761a14d254734a5790bf6f1b05fce0f253a5ac513dc2e62cdf3792"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3596",
    "kind": "arxiv",
    "version": 1
  }
}