Pith Number

pith:4Z66ESNI

pith:2012:4Z66ESNIF2AJSMVKMYCEISFLQV

not attested not anchored not stored refs pending

Arrangements of hypersurfaces and Bestvina-Brady groups

Daniel Matei, Enrique Artal Bartolo, Jose Ignacio Cogolludo-Agustin

arxiv:1207.0311 v2 · 2012-07-02 · math.AG · 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{4Z66ESNIF2AJSMVKMYCEISFLQV}

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	2026-05-18T00:16:57.079341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e67de249a82e809932aa66044448ab8554a532cd003b59e4d9fd14c72274c99c

Aliases

arxiv: 1207.0311 · arxiv_version: 1207.0311v2 · doi: 10.48550/arxiv.1207.0311 · pith_short_12: 4Z66ESNIF2AJ · pith_short_16: 4Z66ESNIF2AJSMVK · pith_short_8: 4Z66ESNI

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/4Z66ESNIF2AJSMVKMYCEISFLQV \
  | 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: e67de249a82e809932aa66044448ab8554a532cd003b59e4d9fd14c72274c99c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7a46a5119375f5099b301ac0a3ba582ff5691f541a879aa43c468efb59b37a1",
    "cross_cats_sorted": [
      "math.AT",
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-07-02T09:12:09Z",
    "title_canon_sha256": "dd2f1aff019d10e851053ed2d8ac94dc2d0cf25df5fb49704403a0c8c83f8d15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0311",
    "kind": "arxiv",
    "version": 2
  }
}