Pith Number

pith:2F4VF6N5

pith:2012:2F4VF6N5IPNXKVEPWXEUEEKYBO

not attested not anchored not stored refs pending

A New Family of Surfaces with K^2=7 and p_g=0

Yifan Chen

arxiv:1210.4633 v3 · 2012-10-17 · 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{2F4VF6N5IPNXKVEPWXEUEEKYBO}

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	2026-05-18T03:41:43.514157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d17952f9bd43db75548fb5c94211580b87c781502866756305625f830b49d88b

Aliases

arxiv: 1210.4633 · arxiv_version: 1210.4633v3 · doi: 10.48550/arxiv.1210.4633 · pith_short_12: 2F4VF6N5IPNX · pith_short_16: 2F4VF6N5IPNXKVEP · pith_short_8: 2F4VF6N5

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/2F4VF6N5IPNXKVEPWXEUEEKYBO \
  | 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: d17952f9bd43db75548fb5c94211580b87c781502866756305625f830b49d88b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e24a9e8d73f34a727b60ac7717937f930a612514e2290c7b87b2bac516fc527",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-10-17T06:10:29Z",
    "title_canon_sha256": "dd1f95984b1fbe4100a5737ad21754827db6456c8d86e74c5f2a41b29cedddd7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.4633",
    "kind": "arxiv",
    "version": 3
  }
}