Pith Number

pith:GCGWIR3F

pith:2013:GCGWIR3FH5DC7RWCEPS2D466LF

not attested not anchored not stored refs pending

A loop group method for Demoulin surfaces in the 3-dimensional real projective space

Shimpei Kobayashi

arxiv:1301.6325 v2 · 2013-01-27 · 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{GCGWIR3FH5DC7RWCEPS2D466LF}

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	2026-05-18T03:28:17.146505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

308d6447653f462fc6c223e5a1f3de59792928792e2d0075651b799f8779f1b2

Aliases

arxiv: 1301.6325 · arxiv_version: 1301.6325v2 · doi: 10.48550/arxiv.1301.6325 · pith_short_12: GCGWIR3FH5DC · pith_short_16: GCGWIR3FH5DC7RWC · pith_short_8: GCGWIR3F

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/GCGWIR3FH5DC7RWCEPS2D466LF \
  | 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: 308d6447653f462fc6c223e5a1f3de59792928792e2d0075651b799f8779f1b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4dc56ffe94c8e3381187bc640faedf81264e8345b484801d5f4306df30d7cdd1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-01-27T07:04:16Z",
    "title_canon_sha256": "cdbcba8d5edac067607aa21e8ffe72ab36caf44aeb59d2b43d5291a30d05c850"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.6325",
    "kind": "arxiv",
    "version": 2
  }
}