Pith Number

pith:IRHLTUZ3

pith:2012:IRHLTUZ3KBY4DFDRWH6VAGAFD2

not attested not anchored not stored refs pending

Rational curves of degree 16 on a general heptic fourfold

Ethan Cotterill

arxiv:1206.2811 v1 · 2012-06-13 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRHLTUZ3KBY4DFDRWH6VAGAFD2}

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	2026-05-18T03:53:43.059202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

444eb9d33b5071c19471b1fd5018051ea699b5ce8d084f782ac40f263d6ddf10

Aliases

arxiv: 1206.2811 · arxiv_version: 1206.2811v1 · doi: 10.48550/arxiv.1206.2811 · pith_short_12: IRHLTUZ3KBY4 · pith_short_16: IRHLTUZ3KBY4DFDR · pith_short_8: IRHLTUZ3

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/IRHLTUZ3KBY4DFDRWH6VAGAFD2 \
  | 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: 444eb9d33b5071c19471b1fd5018051ea699b5ce8d084f782ac40f263d6ddf10

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f2f87853750312aa8a4d359582ca9086f6dd7c063aa77313913cd9130a08705",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-06-13T14:05:57Z",
    "title_canon_sha256": "3df74abd1aff55e16abfba4a92a508017321da5fae2ad442e4e22cba168307fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.2811",
    "kind": "arxiv",
    "version": 1
  }
}