Pith Number

pith:KCE4AIYN

pith:2012:KCE4AIYNMCKMIDJDNU3YEXPXPW

not attested not anchored not stored refs pending

Splitting Algebras II: The Cohomology Algebra

Brad Shelton

arxiv:1208.2202 v1 · 2012-08-10 · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KCE4AIYNMCKMIDJDNU3YEXPXPW}

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	2026-05-18T03:48:59.892217Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5089c0230d6094c40d236d37825df77d99ce0f16c08efe1b8977d84062a0d5ac

Aliases

arxiv: 1208.2202 · arxiv_version: 1208.2202v1 · doi: 10.48550/arxiv.1208.2202 · pith_short_12: KCE4AIYNMCKM · pith_short_16: KCE4AIYNMCKMIDJD · pith_short_8: KCE4AIYN

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/KCE4AIYNMCKMIDJDNU3YEXPXPW \
  | 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: 5089c0230d6094c40d236d37825df77d99ce0f16c08efe1b8977d84062a0d5ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4ca0b5c9376e913a575c5556ab5375574482cd1150584ae0a29da192e5b0de3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2012-08-10T15:14:45Z",
    "title_canon_sha256": "dfd0ad13b4098a7b16df97b7ae9d14aeffc4449647320f451bd84ef5377f8e17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.2202",
    "kind": "arxiv",
    "version": 1
  }
}