Pith Number

pith:R4PXQR76

pith:2017:R4PXQR76YHT2G6Q3XKBMSTJK23

not attested not anchored not stored refs pending

Slice-Polynomial Functions and Twistor Geometry of Ruled Surfaces in $\mathbb{CP}^3$

Amedeo Altavilla, Giulia Sarfatti

arxiv:1712.09946 v1 · 2017-12-28 · math.CV · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R4PXQR76YHT2G6Q3XKBMSTJK23}

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	2026-05-17T23:57:07.730469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f1f7847fec1e7a37a1bba82c94d2ad6fc41f3214d35a7765302b677a215029b

Aliases

arxiv: 1712.09946 · arxiv_version: 1712.09946v1 · doi: 10.48550/arxiv.1712.09946 · pith_short_12: R4PXQR76YHT2 · pith_short_16: R4PXQR76YHT2G6Q3 · pith_short_8: R4PXQR76

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/R4PXQR76YHT2G6Q3XKBMSTJK23 \
  | 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: 8f1f7847fec1e7a37a1bba82c94d2ad6fc41f3214d35a7765302b677a215029b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afc9c314d2095d42b7c68bdec5c977b4ec2407b407901cb2c908c61e1e3b04f9",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2017-12-28T17:29:15Z",
    "title_canon_sha256": "3d671b047acb0cc9f00e41308ea08883d306f16da8fe15a23a79ab4ebe9cbf39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.09946",
    "kind": "arxiv",
    "version": 1
  }
}