Pith Number

pith:DDZMYH3H

pith:2016:DDZMYH3H2WWZ2NB7LFEB5TBNNW

not attested not anchored not stored refs pending

Two-variable Logic with Counting and a Linear Order

Piotr Witkowski, Witold Charatonik

arxiv:1604.06038 v2 · 2016-04-20 · 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{DDZMYH3H2WWZ2NB7LFEB5TBNNW}

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	2026-05-17T23:51:23.756169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18f2cc1f67d5ad9d343f59481ecc2d6d91470b726dd198d39af6fca1aa5a30e5

Aliases

arxiv: 1604.06038 · arxiv_version: 1604.06038v2 · doi: 10.48550/arxiv.1604.06038 · pith_short_12: DDZMYH3H2WWZ · pith_short_16: DDZMYH3H2WWZ2NB7 · pith_short_8: DDZMYH3H

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/DDZMYH3H2WWZ2NB7LFEB5TBNNW \
  | 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: 18f2cc1f67d5ad9d343f59481ecc2d6d91470b726dd198d39af6fca1aa5a30e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73026e68b209466d309371f7a62baa3244423626ea72ffeeb50113d4c2344de8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2016-04-20T17:15:21Z",
    "title_canon_sha256": "db71debd7a36d7ce095f1f37a74b5d8542595eee27035b733f674a7b84dc30c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.06038",
    "kind": "arxiv",
    "version": 2
  }
}