Pith Number

pith:LB7WQRQA

pith:2017:LB7WQRQA5THNJQI7KBP62GEACD

not attested not anchored not stored refs pending

Cellular covers of local groups

Jerome Scherer, Ramon Flores

arxiv:1707.08021 v1 · 2017-07-25 · math.AT · 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{LB7WQRQA5THNJQI7KBP62GEACD}

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	2026-05-18T00:39:29.651614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

587f684600ecced4c11f505fed188010fbeeec4531b25b26cc532990fe7294e4

Aliases

arxiv: 1707.08021 · arxiv_version: 1707.08021v1 · doi: 10.48550/arxiv.1707.08021 · pith_short_12: LB7WQRQA5THN · pith_short_16: LB7WQRQA5THNJQI7 · pith_short_8: LB7WQRQA

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/LB7WQRQA5THNJQI7KBP62GEACD \
  | 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: 587f684600ecced4c11f505fed188010fbeeec4531b25b26cc532990fe7294e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7412ad6ccfec836bde1101382413c36270c19987c5f631a174f13686ee4a1fac",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-07-25T14:52:40Z",
    "title_canon_sha256": "e0358e47e3d2af9a8a402f2b0e4736caad3b4f57caee2c6500212844535f0f7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.08021",
    "kind": "arxiv",
    "version": 1
  }
}