Pith Number

pith:M2JWQYMA

pith:2017:M2JWQYMAN5BI64ZEHO7PD6PYVU

not attested not anchored not stored refs pending

Measures of irrationality of the Fano surface of a cubic threefold

Alexis Kouvidakis, Frank Gounelas

arxiv:1707.00853 v3 · 2017-07-04 · 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{M2JWQYMAN5BI64ZEHO7PD6PYVU}

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	2026-05-18T00:16:56.334165Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66936861806f428f73243bbef1f9f8ad08e3cab957e9aa871e84d403cb595fda

Aliases

arxiv: 1707.00853 · arxiv_version: 1707.00853v3 · doi: 10.48550/arxiv.1707.00853 · pith_short_12: M2JWQYMAN5BI · pith_short_16: M2JWQYMAN5BI64ZE · pith_short_8: M2JWQYMA

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/M2JWQYMAN5BI64ZEHO7PD6PYVU \
  | 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: 66936861806f428f73243bbef1f9f8ad08e3cab957e9aa871e84d403cb595fda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e0cecdffe016e1920a8b7075f049b9bd46a091e2818a9628056c7020a809140",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-07-04T08:45:31Z",
    "title_canon_sha256": "f6a31703a6cc8a4b78f483d31724077f7f0099ec388cc25ef17c7d6024d85047"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.00853",
    "kind": "arxiv",
    "version": 3
  }
}