Pith Number

pith:FS2UEGWP

pith:2013:FS2UEGWPS2AOETEDEUT235RI3R

not attested not anchored not stored refs pending

Deformation equivalence of affine ruled surfaces

Hubert Flenner, Mikhail Zaidenberg, Shulim Kaliman

arxiv:1305.5366 v1 · 2013-05-23 · 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{FS2UEGWPS2AOETEDEUT235RI3R}

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	2026-05-18T03:25:04.987985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2cb5421acf9680e24c832527adf628dc4eb7ed2f34b342aede11bcc1eae6ab50

Aliases

arxiv: 1305.5366 · arxiv_version: 1305.5366v1 · doi: 10.48550/arxiv.1305.5366 · pith_short_12: FS2UEGWPS2AO · pith_short_16: FS2UEGWPS2AOETED · pith_short_8: FS2UEGWP

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/FS2UEGWPS2AOETEDEUT235RI3R \
  | 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: 2cb5421acf9680e24c832527adf628dc4eb7ed2f34b342aede11bcc1eae6ab50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e1c4c8a6238a9c14a7c70928d4ef06dc6837b0137df5c8e9da7358cef6efe9e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-05-23T10:00:42Z",
    "title_canon_sha256": "f4d0b1f8d16ddc22a49b9fbc237bb47c41e61dbad8d06fd413cb89a803b9fcf2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5366",
    "kind": "arxiv",
    "version": 1
  }
}