Pith Number

pith:K5HKBLT6

pith:2018:K5HKBLT63UJ6CC33TX422CNGEE

not attested not anchored not stored refs pending

Unboundedness problems for languages of vector addition systems

Georg Zetzsche, Piotr Hofman, Wojciech Czerwi\'nski

arxiv:1802.06683 v1 · 2018-02-19 · 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{K5HKBLT63UJ6CC33TX422CNGEE}

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	2026-05-18T00:23:02.585343Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

574ea0ae7edd13e10b7b9df9ad09a621218d938008e502d7db92bbe2fa178f22

Aliases

arxiv: 1802.06683 · arxiv_version: 1802.06683v1 · doi: 10.48550/arxiv.1802.06683 · pith_short_12: K5HKBLT63UJ6 · pith_short_16: K5HKBLT63UJ6CC33 · pith_short_8: K5HKBLT6

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/K5HKBLT63UJ6CC33TX422CNGEE \
  | 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: 574ea0ae7edd13e10b7b9df9ad09a621218d938008e502d7db92bbe2fa178f22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa9221bf5d87dacaa35e06bbed1e4fa95fc382cf54eff5fe0e0418cf93d04fd2",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2018-02-19T15:58:24Z",
    "title_canon_sha256": "05918d263dedcf4704808752647cc8964ff7ed45278061b13266ea0767713c60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06683",
    "kind": "arxiv",
    "version": 1
  }
}