Pith Number

pith:BCQL7P4Y

pith:2011:BCQL7P4YEEBQDAFJN6M4Y2OSBI

not attested not anchored not stored refs pending

Homological Coordinatization

Andrew Tausz, Gunnar Carlsson

arxiv:1107.0511 v2 · 2011-07-04 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BCQL7P4YEEBQDAFJN6M4Y2OSBI}

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	2026-05-18T04:15:18.451641Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08a0bfbf9821030180a96f99cc69d20a00f9ed5bc518869e6a4306c8bf4d2657

Aliases

arxiv: 1107.0511 · arxiv_version: 1107.0511v2 · doi: 10.48550/arxiv.1107.0511 · pith_short_12: BCQL7P4YEEBQ · pith_short_16: BCQL7P4YEEBQDAFJ · pith_short_8: BCQL7P4Y

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/BCQL7P4YEEBQDAFJN6M4Y2OSBI \
  | 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: 08a0bfbf9821030180a96f99cc69d20a00f9ed5bc518869e6a4306c8bf4d2657

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dac2f7ab99eb9b4d7f37b5143d0c6369a7211d6aaf036cf746beb306ff34180f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2011-07-04T01:36:49Z",
    "title_canon_sha256": "f6098e8e16b70db63c2af74390ade0ec4a3290b2b88c26f41046138b349d3640"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0511",
    "kind": "arxiv",
    "version": 2
  }
}