Pith Number

pith:JWYAFLMY

pith:2012:JWYAFLMYHUGFGYN7KCS7L6JRID

not attested not anchored not stored refs pending

BPA Bisimilarity is EXPTIME-hard

Stefan Kiefer

arxiv:1205.7041 v2 · 2012-05-31 · cs.FL · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JWYAFLMYHUGFGYN7KCS7L6JRID}

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	2026-05-18T03:39:28.607007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4db002ad983d0c5361bf50a5f5f93140fd7a86358c193b3e6597029367cb7dac

Aliases

arxiv: 1205.7041 · arxiv_version: 1205.7041v2 · doi: 10.48550/arxiv.1205.7041 · pith_short_12: JWYAFLMYHUGF · pith_short_16: JWYAFLMYHUGFGYN7 · pith_short_8: JWYAFLMY

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/JWYAFLMYHUGFGYN7KCS7L6JRID \
  | 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: 4db002ad983d0c5361bf50a5f5f93140fd7a86358c193b3e6597029367cb7dac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31c402db39402ddb91efe2c4cf2f0b3fdd33ceb56873d8fcfe083bb63eeda99e",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2012-05-31T16:43:21Z",
    "title_canon_sha256": "49afa310dc77c469c7c2dedaf72f5ce5f23c0b0bc316bb7f23ebc016d6d62a94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.7041",
    "kind": "arxiv",
    "version": 2
  }
}