Pith Number

pith:XY6XKGPK

pith:2013:XY6XKGPKXYZWDBQREEYME5C6HM

not attested not anchored not stored refs pending

Unary languages recognized by two-way one-counter automata

Abuzer Yakaryilmaz, Marzio De Biasi

arxiv:1311.0849 v2 · 2013-11-04 · cs.FL · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XY6XKGPKXYZWDBQREEYME5C6HM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:48:09.833047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be3d7519eabe336186112130c2745e3b10c276284cfcc010714ac093ed89a28f

Aliases

arxiv: 1311.0849 · arxiv_version: 1311.0849v2 · doi: 10.48550/arxiv.1311.0849 · pith_short_12: XY6XKGPKXYZW · pith_short_16: XY6XKGPKXYZWDBQR · pith_short_8: XY6XKGPK

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/XY6XKGPKXYZWDBQREEYME5C6HM \
  | 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: be3d7519eabe336186112130c2745e3b10c276284cfcc010714ac093ed89a28f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "211a1f8b4cb06c04af2ec44a2cf559d738e8e4417434d25e8eee2c12af61d4fa",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2013-11-04T20:53:30Z",
    "title_canon_sha256": "31624a1e5b26131e3d9d31c01ec5a34ed523c1a8feacbd86e02ae65670a93c3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.0849",
    "kind": "arxiv",
    "version": 2
  }
}