Pith Number

pith:Z6RP7AKT

pith:2018:Z6RP7AKTBHORG5NIPDSTIROXIF

not attested not anchored not stored refs pending

Surface theory in discrete projective differential geometry. I. A canonical frame and an integrable discrete Demoulin system

A. Szereszewski, W.K. Schief

arxiv:1801.08339 v1 · 2018-01-25 · math.DG · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z6RP7AKTBHORG5NIPDSTIROXIF}

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	2026-05-18T00:11:38.726095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfa2ff815309dd1375a878e53445d74143b04a6630858f427c2b1f05595553b4

Aliases

arxiv: 1801.08339 · arxiv_version: 1801.08339v1 · doi: 10.48550/arxiv.1801.08339 · pith_short_12: Z6RP7AKTBHOR · pith_short_16: Z6RP7AKTBHORG5NI · pith_short_8: Z6RP7AKT

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/Z6RP7AKTBHORG5NIPDSTIROXIF \
  | 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: cfa2ff815309dd1375a878e53445d74143b04a6630858f427c2b1f05595553b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea8baf38a3ecee33148f4d792b76b6a0efea8502b46b15478eb4ea0b35ed32a7",
    "cross_cats_sorted": [
      "nlin.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-01-25T10:25:58Z",
    "title_canon_sha256": "9fc81af2ad1c161a6bbc553775cc78e4426890e92c67b3d04a45ab1d8c820f59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.08339",
    "kind": "arxiv",
    "version": 1
  }
}