Pith Number

pith:ULL2EXBY

pith:2013:ULL2EXBYFSZFVYTK223XVW2ING

not attested not anchored not stored refs pending

Propositional Encoding of Constraints over Tree-Shaped Data

Alexander Bau, Johannes Waldmann

arxiv:1305.4957 v1 · 2013-05-21 · 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{ULL2EXBYFSZFVYTK223XVW2ING}

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	2026-05-18T03:25:05.348271Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2d7a25c382cb25ae26ad6b77adb486990ad04f4a1cfda3bad7bcfccecc9e5e4

Aliases

arxiv: 1305.4957 · arxiv_version: 1305.4957v1 · doi: 10.48550/arxiv.1305.4957 · pith_short_12: ULL2EXBYFSZF · pith_short_16: ULL2EXBYFSZFVYTK · pith_short_8: ULL2EXBY

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/ULL2EXBYFSZFVYTK223XVW2ING \
  | 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: a2d7a25c382cb25ae26ad6b77adb486990ad04f4a1cfda3bad7bcfccecc9e5e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90f30b396c3ece9308b12456fc87b6260024a56821533d99d6022677214c3271",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2013-05-21T20:35:20Z",
    "title_canon_sha256": "4bba7ec90c136831968387f9d76878145b021e01abedbbae06d4e7a3fca9e865"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.4957",
    "kind": "arxiv",
    "version": 1
  }
}