Pith Number

pith:IQR4RP2P

pith:2013:IQR4RP2P52VHBE2QWQHH6IPK5P

not attested not anchored not stored refs pending

Varieties of minimal rational tangents on double covers of projective space

Hosung Kim, Jun-Muk Hwang

arxiv:1303.7312 v1 · 2013-03-29 · 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{IQR4RP2P52VHBE2QWQHH6IPK5P}

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	2026-05-18T03:29:28.919160Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4423c8bf4feeaa709350b40e7f21eaebf038ad7aba1fb7b86d05fd66a40175ff

Aliases

arxiv: 1303.7312 · arxiv_version: 1303.7312v1 · doi: 10.48550/arxiv.1303.7312 · pith_short_12: IQR4RP2P52VH · pith_short_16: IQR4RP2P52VHBE2Q · pith_short_8: IQR4RP2P

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/IQR4RP2P52VHBE2QWQHH6IPK5P \
  | 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: 4423c8bf4feeaa709350b40e7f21eaebf038ad7aba1fb7b86d05fd66a40175ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebcdce19634edf59d6f6f5f7bc6241758101df815a7d1eb456c528ceef613195",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-03-29T07:03:23Z",
    "title_canon_sha256": "07740650e71c5295605631ac1db8993b4cbcc19c5c6a396f28175c883d85070f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.7312",
    "kind": "arxiv",
    "version": 1
  }
}