Pith Number

pith:JBFA43GG

pith:2019:JBFA43GG4TWXGHZURT2WFPIT45

not attested not anchored not stored refs pending

Regular Separability and Intersection Emptiness are Independent Problems

Georg Zetzsche, Ramanathan S. Thinniyam

arxiv:1908.04038 v1 · 2019-08-12 · 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{JBFA43GG4TWXGHZURT2WFPIT45}

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	2026-07-04T23:53:20.179842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

484a0e6cc6e4ed731f348cf562bd13e77d454e242be3e5333e66902ee11ceaa2

Aliases

arxiv: 1908.04038 · arxiv_version: 1908.04038v1 · doi: 10.48550/arxiv.1908.04038 · pith_short_12: JBFA43GG4TWX · pith_short_16: JBFA43GG4TWXGHZU · pith_short_8: JBFA43GG

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/JBFA43GG4TWXGHZURT2WFPIT45 \
  | 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: 484a0e6cc6e4ed731f348cf562bd13e77d454e242be3e5333e66902ee11ceaa2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ad43672e4a1e90eb07129ea14cdc6f09cffca1c1506c604470ea8d30cf0ddd3",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2019-08-12T07:42:29Z",
    "title_canon_sha256": "75d53eede51fed27a7fd9353af38a863d7d4338790657ab39b3d8519df825d71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.04038",
    "kind": "arxiv",
    "version": 1
  }
}