Pith Number

pith:VBSJ3UKS

pith:2014:VBSJ3UKSXZE67MX66PJECYM7GC

not attested not anchored not stored refs pending

Universal central extensions for groups of sections on non-compact manifolds

Jan Milan Eyni

arxiv:1411.5851 v3 · 2014-11-21 · 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{VBSJ3UKSXZE67MX66PJECYM7GC}

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	2026-05-18T01:19:18.741659Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8649dd152be49efb2fef3d241619f30b1df2a2fccc1c64eb8b87c3717e8f438

Aliases

arxiv: 1411.5851 · arxiv_version: 1411.5851v3 · doi: 10.48550/arxiv.1411.5851 · pith_short_12: VBSJ3UKSXZE6 · pith_short_16: VBSJ3UKSXZE67MX6 · pith_short_8: VBSJ3UKS

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/VBSJ3UKSXZE67MX66PJECYM7GC \
  | 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: a8649dd152be49efb2fef3d241619f30b1df2a2fccc1c64eb8b87c3717e8f438

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dffc5e92bdce571595a774d2e4572e0574a458d95480c3d556f12d99a2b5ad4a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2014-11-21T12:53:59Z",
    "title_canon_sha256": "fd8869bf5e9e42861ce2f59b4d425135c30ed5b7e3932d652f28bebc14fcab94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.5851",
    "kind": "arxiv",
    "version": 3
  }
}