Pith Number

pith:OYB2ZZC5

pith:2009:OYB2ZZC5BEU4SRB3SOP5TRX7Z2

not attested not anchored not stored refs pending

Directed algebraic topology and higher dimensional transition system

Philippe Gaucher

arxiv:0903.4276 v2 · 2009-03-25 · math.CT · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OYB2ZZC5BEU4SRB3SOP5TRX7Z2}

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	2026-05-18T04:35:55.294634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7603ace45d0929c9443b939fd9c6ffce95bc4d6545b623b428377339adba4cb9

Aliases

arxiv: 0903.4276 · arxiv_version: 0903.4276v2 · doi: 10.48550/arxiv.0903.4276 · pith_short_12: OYB2ZZC5BEU4 · pith_short_16: OYB2ZZC5BEU4SRB3 · pith_short_8: OYB2ZZC5

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/OYB2ZZC5BEU4SRB3SOP5TRX7Z2 \
  | 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: 7603ace45d0929c9443b939fd9c6ffce95bc4d6545b623b428377339adba4cb9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5440d19005ed75a970bf431accbc03c3b3c3540eff21ca5342b00957ee3ee5b",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2009-03-25T09:38:10Z",
    "title_canon_sha256": "e5d5f1b8551d3cf7234c85cd2a97267112e7afa99114bde0ab6de9a830c10a65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4276",
    "kind": "arxiv",
    "version": 2
  }
}