Pith Number

pith:YPDWZKIZ

pith:2015:YPDWZKIZURG54BTXQS4DRRB6RP

not attested not anchored not stored refs pending

Timed pushdown automata revisited

Lorenzo Clemente, S{\l}awomir Lasota

arxiv:1503.02422 v2 · 2015-03-09 · cs.FL · cs.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{YPDWZKIZURG54BTXQS4DRRB6RP}

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	2026-05-18T02:18:32.704253Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3c76ca919a44dde067784b838c43e8bcec9f7be7f57fd8337b224713faf4e4a

Aliases

arxiv: 1503.02422 · arxiv_version: 1503.02422v2 · doi: 10.48550/arxiv.1503.02422 · pith_short_12: YPDWZKIZURG5 · pith_short_16: YPDWZKIZURG54BTX · pith_short_8: YPDWZKIZ

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/YPDWZKIZURG54BTXQS4DRRB6RP \
  | 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: c3c76ca919a44dde067784b838c43e8bcec9f7be7f57fd8337b224713faf4e4a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "69d7261a9ca8ba45732ed1147b12e6db08b5b3add5bd29754820c74f85736345",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-03-09T10:59:48Z",
    "title_canon_sha256": "139c65f0f28d4cb61d8e8c2245ad271a96b8aa45c1b34d8309642ff043d982c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02422",
    "kind": "arxiv",
    "version": 2
  }
}