Pith Number

pith:PQGC6HYB

pith:2009:PQGC6HYBVMSN4TFQPQJG4QYMXM

not attested not anchored not stored refs pending

Bifinite Chu Spaces

Guo-Qiang Zhang, Manfred Droste

arxiv:0911.3214 v2 · 2009-11-17 · cs.LO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PQGC6HYBVMSN4TFQPQJG4QYMXM}

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	2026-05-18T01:37:40.242679Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c0c2f1f01ab24de4cb07c126e430cbb0398cd41b0493f348e6654c561e0a6a6

Aliases

arxiv: 0911.3214 · arxiv_version: 0911.3214v2 · doi: 10.48550/arxiv.0911.3214 · pith_short_12: PQGC6HYBVMSN · pith_short_16: PQGC6HYBVMSN4TFQ · pith_short_8: PQGC6HYB

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/PQGC6HYBVMSN4TFQPQJG4QYMXM \
  | 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: 7c0c2f1f01ab24de4cb07c126e430cbb0398cd41b0493f348e6654c561e0a6a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c31e03936510644befd097ef9d9e418ab78e6c02b97e6d0a10339b66e21841ca",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2009-11-17T06:27:14Z",
    "title_canon_sha256": "00ee5565300d2f2702226825c3e22733a8c8cb08a06da357e6d28d92ffd87b84"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.3214",
    "kind": "arxiv",
    "version": 2
  }
}