Pith Number

pith:SDX6QQA7

pith:2016:SDX6QQA7OPKQBXIXX4CZCAORK3

not attested not anchored not stored refs pending

Van Est isomorphism for homogeneous cochains

Alejandro Cabrera, Thiago Drummond

arxiv:1602.06887 v1 · 2016-02-22 · math.DG · 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{SDX6QQA7OPKQBXIXX4CZCAORK3}

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	2026-05-18T00:34:23.232360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90efe8401f73d500dd17bf059101d156e64cd6ca7cd09027a4550653ba7f5399

Aliases

arxiv: 1602.06887 · arxiv_version: 1602.06887v1 · doi: 10.48550/arxiv.1602.06887 · pith_short_12: SDX6QQA7OPKQ · pith_short_16: SDX6QQA7OPKQBXIX · pith_short_8: SDX6QQA7

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/SDX6QQA7OPKQBXIXX4CZCAORK3 \
  | 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: 90efe8401f73d500dd17bf059101d156e64cd6ca7cd09027a4550653ba7f5399

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8df9a50f42860691cb553b11e93ab8210c14d49ddd42fdc68c09b321dd8b0ad7",
    "cross_cats_sorted": [
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-02-22T18:47:52Z",
    "title_canon_sha256": "2644b8c6be61f7d9e7cce3996648b962e471a4f17559d6ea57fc508e76bf7a1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.06887",
    "kind": "arxiv",
    "version": 1
  }
}