Pith Number

pith:E4QIYGI7

pith:2019:E4QIYGI7XSJPLRWUATNCMI6AOG

not attested not anchored not stored refs pending

Bisimulation Invariant Monadic-Second Order Logic in the Finite

Achim Blumensath, Felix Wolf

arxiv:1905.06668 v1 · 2019-05-16 · 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{E4QIYGI7XSJPLRWUATNCMI6AOG}

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	2026-05-17T23:46:01.468479Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27208c191fbc92f5c6d404da2623c071b00e6627902104587f55bbf20bf55797

Aliases

arxiv: 1905.06668 · arxiv_version: 1905.06668v1 · doi: 10.48550/arxiv.1905.06668 · pith_short_12: E4QIYGI7XSJP · pith_short_16: E4QIYGI7XSJPLRWU · pith_short_8: E4QIYGI7

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/E4QIYGI7XSJPLRWUATNCMI6AOG \
  | 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: 27208c191fbc92f5c6d404da2623c071b00e6627902104587f55bbf20bf55797

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93489954e2e2884f4ab2291187d727c3bebe3a843dc4c0c7bde7a982c2f64064",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-05-16T11:37:41Z",
    "title_canon_sha256": "0a3e70fddf7c1312412b08ea480a76822ef875fb8436ab2f8d1d8e855ead8851"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.06668",
    "kind": "arxiv",
    "version": 1
  }
}