Pith Number

pith:M7SDU4EF

pith:2009:M7SDU4EFEFVSLFCKQCXCMXHY6M

not attested not anchored not stored refs pending

The Category Theoretic Solution of Recursive Program Schemes

Lawrence S. Moss, Stefan Milius

arxiv:0904.2385 v2 · 2009-04-15 · cs.LO · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M7SDU4EFEFVSLFCKQCXCMXHY6M}

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	2026-05-18T04:30:59.919209Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67e43a7085216b25944a80ae265cf8f31fbee374cac8dff677ba91e44b50d8d5

Aliases

arxiv: 0904.2385 · arxiv_version: 0904.2385v2 · doi: 10.48550/arxiv.0904.2385 · pith_short_12: M7SDU4EFEFVS · pith_short_16: M7SDU4EFEFVSLFCK · pith_short_8: M7SDU4EF

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/M7SDU4EFEFVSLFCKQCXCMXHY6M \
  | 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: 67e43a7085216b25944a80ae265cf8f31fbee374cac8dff677ba91e44b50d8d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "23a38f19071c34140d94fb5048b6de6bfe3427096d292f83429cb374404f448d",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2009-04-15T19:57:26Z",
    "title_canon_sha256": "067d735bfaed40c260df53f898ca78560dbb0609f13163462871fe26d6b79f53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2385",
    "kind": "arxiv",
    "version": 2
  }
}