Pith Number

pith:XYQRQRLG

pith:2017:XYQRQRLGRJY5OYVEA64ZUCUFRV

not attested not anchored not stored refs pending

Monadic Second-Order Logic with Arbitrary Monadic Predicates

Charles Paperman, Nathana\"el Fijalkow

arxiv:1709.03117 v1 · 2017-09-10 · 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{XYQRQRLGRJY5OYVEA64ZUCUFRV}

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	2026-05-18T00:35:39.337604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be211845668a71d762a407b99a0a858d7a327ac9f2d7868bd49f73791347b009

Aliases

arxiv: 1709.03117 · arxiv_version: 1709.03117v1 · doi: 10.48550/arxiv.1709.03117 · pith_short_12: XYQRQRLGRJY5 · pith_short_16: XYQRQRLGRJY5OYVE · pith_short_8: XYQRQRLG

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/XYQRQRLGRJY5OYVEA64ZUCUFRV \
  | 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: be211845668a71d762a407b99a0a858d7a327ac9f2d7868bd49f73791347b009

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ca860373fb20a6ab71314fa535b5201db52a68200e42e11a258c805c2dd206f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-09-10T15:36:28Z",
    "title_canon_sha256": "62b3b083db8f8d42c81becaf2f535659aa571e3222a2ecda1776de18a913a752"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.03117",
    "kind": "arxiv",
    "version": 1
  }
}