Pith Number

pith:IWWBZQZN

pith:2017:IWWBZQZNCJYNTLO2JHLEUTEWVW

not attested not anchored not stored refs pending

Fundamental groups of real arrangements and torsion in the lower central series quotients

Beno\^it Guerville-Ball\'e, Enrique Artal Bartolo, Juan Viu-Sos

arxiv:1704.04152 v3 · 2017-04-13 · math.GT · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IWWBZQZNCJYNTLO2JHLEUTEWVW}

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	2026-05-18T00:16:56.509283Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45ac1cc32d1270d9adda49d64a4c96adaffd987872535450f8c1add948b4c3a5

Aliases

arxiv: 1704.04152 · arxiv_version: 1704.04152v3 · doi: 10.48550/arxiv.1704.04152 · pith_short_12: IWWBZQZNCJYN · pith_short_16: IWWBZQZNCJYNTLO2 · pith_short_8: IWWBZQZN

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/IWWBZQZNCJYNTLO2JHLEUTEWVW \
  | 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: 45ac1cc32d1270d9adda49d64a4c96adaffd987872535450f8c1add948b4c3a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0541fa7778d5e375df51ec29ad50f83e96aee411ab91349690ce2b62ec898639",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2017-04-13T14:38:38Z",
    "title_canon_sha256": "3f4a617b7a72934e22afea5f5fd17e08efa75b3ba1c3dc6211653d37f67f8c59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.04152",
    "kind": "arxiv",
    "version": 3
  }
}