Pith Number

pith:OF4QBPEM

pith:2014:OF4QBPEM5J3PO4IZKGLROSPUQF

not attested not anchored not stored refs pending

Annihilation of cohomology and strong generation of module categories

Ryo Takahashi, Srikanth B. Iyengar

arxiv:1404.1476 v2 · 2014-04-05 · math.AC · math.RA · 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{OF4QBPEM5J3PO4IZKGLROSPUQF}

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	2026-05-18T02:18:01.520725Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

717900bc8cea76f7711951971749f4814a60f59c7e9abe02d42f6449df5395f9

Aliases

arxiv: 1404.1476 · arxiv_version: 1404.1476v2 · doi: 10.48550/arxiv.1404.1476 · pith_short_12: OF4QBPEM5J3P · pith_short_16: OF4QBPEM5J3PO4IZ · pith_short_8: OF4QBPEM

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/OF4QBPEM5J3PO4IZKGLROSPUQF \
  | 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: 717900bc8cea76f7711951971749f4814a60f59c7e9abe02d42f6449df5395f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ee3d24766a448e910abc9acadd62a8a6a2b4a06e8e3b8d231b1dfacfb1f3525",
    "cross_cats_sorted": [
      "math.RA",
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2014-04-05T13:14:05Z",
    "title_canon_sha256": "0985705af0638934435db0926839e78841d86717d0058cee791086c800705c4b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.1476",
    "kind": "arxiv",
    "version": 2
  }
}