Pith Number

pith:6LFLFHFK

pith:2011:6LFLFHFKZHKTZZ62BISBKTP67L

not attested not anchored not stored refs pending

Being Van Kampen is a universal property

ECS, France), Pawel Sobocinski (DSSE, Tobias Heindel (Laboratoire d'Informatique de Paris-Nord, Universit\'e de Paris, University of Southampton)

arxiv:1101.4594 v2 · 2011-01-24 · math.CT · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6LFLFHFKZHKTZZ62BISBKTP67L}

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	2026-05-18T01:37:39.674454Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2cab29caac9d53ce7da0a24154dfefae0b4734aabacb76483d210735018fac1

Aliases

arxiv: 1101.4594 · arxiv_version: 1101.4594v2 · doi: 10.48550/arxiv.1101.4594 · pith_short_12: 6LFLFHFKZHKT · pith_short_16: 6LFLFHFKZHKTZZ62 · pith_short_8: 6LFLFHFK

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/6LFLFHFKZHKTZZ62BISBKTP67L \
  | 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: f2cab29caac9d53ce7da0a24154dfefae0b4734aabacb76483d210735018fac1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "418aca41e02b52204ef3856ef7c6390e9f7d5479230e5de317d86c29330cebe7",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2011-01-24T17:14:14Z",
    "title_canon_sha256": "03e9bd8251d51549004fab8d909133420cfe4dc367e9832abff788166a759e34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4594",
    "kind": "arxiv",
    "version": 2
  }
}