Pith Number

pith:EV6RXMF5

pith:2014:EV6RXMF5VF775MG5SE33KDQFR3

not attested not anchored not stored refs pending

Cohomology of finite groups without homological algebra

Nikolay N. Mostovsky, Sergei O. Ivanov

arxiv:1403.1425 v5 · 2014-03-06 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EV6RXMF5VF775MG5SE33KDQFR3}

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	2026-05-18T01:36:51.784175Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

257d1bb0bda97ffeb0dd9137b50e058ef7a5420307a91bd4da07c8e87a138ebb

Aliases

arxiv: 1403.1425 · arxiv_version: 1403.1425v5 · doi: 10.48550/arxiv.1403.1425 · pith_short_12: EV6RXMF5VF77 · pith_short_16: EV6RXMF5VF775MG5 · pith_short_8: EV6RXMF5

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/EV6RXMF5VF775MG5SE33KDQFR3 \
  | 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: 257d1bb0bda97ffeb0dd9137b50e058ef7a5420307a91bd4da07c8e87a138ebb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de650d09adc70a5d692500f3b1918f513e1cf0f9bcd4d96dd2c6971413294c72",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2014-03-06T12:03:12Z",
    "title_canon_sha256": "97491fd65ef63f19adfae0161cbf66f9105607f9c89defe8dbede141c7dbd277"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.1425",
    "kind": "arxiv",
    "version": 5
  }
}