Pith Number

pith:ULDVVYIG

pith:2012:ULDVVYIGCYRFK2U2LMXOWXXPZM

not attested not anchored not stored refs pending

Ramified Structural Recursion and Corecursion

James S. Royer, Norman Danner

arxiv:1201.4567 v2 · 2012-01-22 · cs.LO · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ULDVVYIGCYRFK2U2LMXOWXXPZM}

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	2026-05-18T04:03:42.509277Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2c75ae1061622556a9a5b2eeb5eefcb0fa765ff558ab2136f0236c4207a2aee

Aliases

arxiv: 1201.4567 · arxiv_version: 1201.4567v2 · doi: 10.48550/arxiv.1201.4567 · pith_short_12: ULDVVYIGCYRF · pith_short_16: ULDVVYIGCYRFK2U2 · pith_short_8: ULDVVYIG

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/ULDVVYIGCYRFK2U2LMXOWXXPZM \
  | 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: a2c75ae1061622556a9a5b2eeb5eefcb0fa765ff558ab2136f0236c4207a2aee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93561b502541365d3b629b945ef11045a223ae916288925cc72b0f67edad1c1a",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-01-22T16:06:01Z",
    "title_canon_sha256": "943a773b3fdc952e1f22d7fcb9aba55e367bd1bee54e28b8cf7b2bb35dfaaf34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4567",
    "kind": "arxiv",
    "version": 2
  }
}