Pith Number

pith:UTFXQH45

pith:2012:UTFXQH45YNF5UTE23HXQM6Y7FT

not attested not anchored not stored refs pending

The Power of Centralized PC Systems of Pushdown Automata

Holger Petersen

arxiv:1208.1283 v2 · 2012-08-06 · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UTFXQH45YNF5UTE23HXQM6Y7FT}

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	2026-05-18T02:45:48.817488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4cb781f9dc34bda4c9ad9ef067b1f2cde7be1723dec5e3abe6a976a5341f752

Aliases

arxiv: 1208.1283 · arxiv_version: 1208.1283v2 · doi: 10.48550/arxiv.1208.1283 · pith_short_12: UTFXQH45YNF5 · pith_short_16: UTFXQH45YNF5UTE2 · pith_short_8: UTFXQH45

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/UTFXQH45YNF5UTE23HXQM6Y7FT \
  | 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: a4cb781f9dc34bda4c9ad9ef067b1f2cde7be1723dec5e3abe6a976a5341f752

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1311ba02f2daf741886255789b49a88f048ec2fd25c991b42c276f6962ad5bc9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2012-08-06T21:11:03Z",
    "title_canon_sha256": "36aa43115cf6aa9e638926dea4adbb6d73d71f2650c7e3106df9514213e18fd5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.1283",
    "kind": "arxiv",
    "version": 2
  }
}