Pith Number

pith:F7LOSZLJ

pith:2012:F7LOSZLJLMW3ONOD7AQDT4QW4S

not attested not anchored not stored refs pending

On the conjectural cohomology for groups

Simon Covez

arxiv:1202.2269 v2 · 2012-02-10 · math.KT · 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{F7LOSZLJLMW3ONOD7AQDT4QW4S}

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	2026-05-18T03:54:27.506541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fd6e965695b2db735c3f82039f216e4b3618b64211ca430f47353d6a8e0bd57

Aliases

arxiv: 1202.2269 · arxiv_version: 1202.2269v2 · doi: 10.48550/arxiv.1202.2269 · pith_short_12: F7LOSZLJLMW3 · pith_short_16: F7LOSZLJLMW3ONOD · pith_short_8: F7LOSZLJ

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/F7LOSZLJLMW3ONOD7AQDT4QW4S \
  | 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: 2fd6e965695b2db735c3f82039f216e4b3618b64211ca430f47353d6a8e0bd57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae1dc7f3dfe4795d7fd726d74b86081ed8c78fab1111246431eac42c00852241",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2012-02-10T14:37:24Z",
    "title_canon_sha256": "fef96e54e8143a5f15efe26934819278f35c04f7ff9be5f2d5cc6b4fe2ca0ab5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.2269",
    "kind": "arxiv",
    "version": 2
  }
}