Pith Number

pith:7VNCJDO6

pith:2015:7VNCJDO6UNBXADKUMRCRTT2ZU2

not attested not anchored not stored refs pending

On fundamental groups of plane curve complements

Alexandru Dimca, Enrique Artal Bartolo

arxiv:1507.08178 v1 · 2015-07-29 · math.AG · 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{7VNCJDO6UNBXADKUMRCRTT2ZU2}

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	2026-05-18T00:36:33.588100Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd5a248ddea343700d54644519cf59a6bdaaf388be762b6652f6c54054ba8361

Aliases

arxiv: 1507.08178 · arxiv_version: 1507.08178v1 · doi: 10.48550/arxiv.1507.08178 · pith_short_12: 7VNCJDO6UNBX · pith_short_16: 7VNCJDO6UNBXADKU · pith_short_8: 7VNCJDO6

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/7VNCJDO6UNBXADKUMRCRTT2ZU2 \
  | 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: fd5a248ddea343700d54644519cf59a6bdaaf388be762b6652f6c54054ba8361

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c580a7f1830dca524f5d9b76e89e610aefd5145f9aed8cce8b15adc67218e48",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-07-29T15:09:27Z",
    "title_canon_sha256": "8202c8cfee3d96a7ac7aa6375eccd9a6893fcb9a7bcc6251a0a536f37550454a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.08178",
    "kind": "arxiv",
    "version": 1
  }
}