Pith Number

pith:ZKPG4BRV

pith:2011:ZKPG4BRVFUY2F3CZ5IGFPBXQHY

not attested not anchored not stored refs pending

F-structures and Bredon-Galois cohomology

Dieter Degrijse, Nansen Petrosyan

arxiv:1104.1766 v1 · 2011-04-10 · math.AT · math.CT · math.GR · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZKPG4BRVFUY2F3CZ5IGFPBXQHY}

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	2026-05-18T04:24:43.251624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca9e6e06352d31a2ec59ea0c5786f03e2291743a1e7577a5a4c26b3ae307d7a8

Aliases

arxiv: 1104.1766 · arxiv_version: 1104.1766v1 · doi: 10.48550/arxiv.1104.1766 · pith_short_12: ZKPG4BRVFUY2 · pith_short_16: ZKPG4BRVFUY2F3CZ · pith_short_8: ZKPG4BRV

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/ZKPG4BRVFUY2F3CZ5IGFPBXQHY \
  | 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: ca9e6e06352d31a2ec59ea0c5786f03e2291743a1e7577a5a4c26b3ae307d7a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1fde0384a70b38f4fe1da9ce4ecff5fa2b0ae42f1dd44fb4edb80a00597cf59",
    "cross_cats_sorted": [
      "math.CT",
      "math.GR",
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2011-04-10T13:15:28Z",
    "title_canon_sha256": "e4bbdfdd1a9b7531a2b2f9cdcc47aa0d368cc24398e7861273fc839af45ab3f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1766",
    "kind": "arxiv",
    "version": 1
  }
}