Pith Number

pith:XQI3FR4R

pith:2009:XQI3FR4R2CCSPCU2ZPZZXLXBP4

not attested not anchored not stored refs pending

Acyclic Chain complexes over the Orbit Category

Ergun Yalcin, Ian Hambleton

arxiv:0909.0698 v2 · 2009-09-03 · math.AT · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XQI3FR4R2CCSPCU2ZPZZXLXBP4}

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	2026-05-18T03:34:03.798281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc11b2c791d085278a9acbf39baee17f0d375044719a2ad5601dea677bd0f4bd

Aliases

arxiv: 0909.0698 · arxiv_version: 0909.0698v2 · doi: 10.48550/arxiv.0909.0698 · pith_short_12: XQI3FR4R2CCS · pith_short_16: XQI3FR4R2CCSPCU2 · pith_short_8: XQI3FR4R

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/XQI3FR4R2CCSPCU2ZPZZXLXBP4 \
  | 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: bc11b2c791d085278a9acbf39baee17f0d375044719a2ad5601dea677bd0f4bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9aed112ccf62a77609bbe61fada35b7ba88bb4243280e2fb5604b2715f9c9047",
    "cross_cats_sorted": [
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2009-09-03T16:16:10Z",
    "title_canon_sha256": "b92daaa0a7e6ddc7201614bf69bb6b80b1c43e55bd4cc24790c91919f75b5342"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0698",
    "kind": "arxiv",
    "version": 2
  }
}