Pith Number

pith:FIPPC23Z

pith:2012:FIPPC23ZUEZMTFICV332F25NS7

not attested not anchored not stored refs pending

Characterizing Van Kampen Squares via Descent Data

Harald K\"onig, Michael L\"owe, Uwe Wolter

arxiv:1209.1435 v1 · 2012-09-07 · cs.DM · 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{FIPPC23ZUEZMTFICV332F25NS7}

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	2026-05-18T03:46:04.830303Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a1ef16b79a132c99502aef7a2ebad97de86ff92083f50559fad15b5f5a57234

Aliases

arxiv: 1209.1435 · arxiv_version: 1209.1435v1 · doi: 10.48550/arxiv.1209.1435 · pith_short_12: FIPPC23ZUEZM · pith_short_16: FIPPC23ZUEZMTFIC · pith_short_8: FIPPC23Z

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/FIPPC23ZUEZMTFICV332F25NS7 \
  | 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: 2a1ef16b79a132c99502aef7a2ebad97de86ff92083f50559fad15b5f5a57234

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "780500c03c5e4c7e04069c54a39d174166032cb80a7ae30db57502d447c8abd3",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2012-09-07T01:22:15Z",
    "title_canon_sha256": "02ba63708afc4961a89ad24f4ef212ef828e189f87507abdccdcd605f0372853"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.1435",
    "kind": "arxiv",
    "version": 1
  }
}