Pith Number

pith:RQRF2YBN

pith:2013:RQRF2YBN65QLW4HIUIQCDZTE5W

not attested not anchored not stored refs pending

Second-order equations and local isometric immersions of pseudo-spherical surfaces

Keti Tenenblat, Nabil Kahouadji, Niky Kamran

arxiv:1308.6545 v2 · 2013-08-29 · 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{RQRF2YBN65QLW4HIUIQCDZTE5W}

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	2026-05-18T01:33:49.378102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c225d602df760bb70e8a22021e664ed9cba9367af0abb4b0438dd9555d34636

Aliases

arxiv: 1308.6545 · arxiv_version: 1308.6545v2 · doi: 10.48550/arxiv.1308.6545 · pith_short_12: RQRF2YBN65QL · pith_short_16: RQRF2YBN65QLW4HI · pith_short_8: RQRF2YBN

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/RQRF2YBN65QLW4HIUIQCDZTE5W \
  | 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: 8c225d602df760bb70e8a22021e664ed9cba9367af0abb4b0438dd9555d34636

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fe372a776c95144362a0503181ac6a8ada4e22ce86720b00853c4a4ec3669d6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-08-29T18:24:05Z",
    "title_canon_sha256": "255f3aa6612b2f7cbcd050fba5ae832d9b95ac26d197fc7d7a5843a858d15330"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.6545",
    "kind": "arxiv",
    "version": 2
  }
}