Pith Number

pith:QXQHDWNV

pith:2012:QXQHDWNVYDLITCTSHDGQV3RMK2

not attested not anchored not stored refs pending

On Almost-Riemannian Surfaces

Roberta Ghezzi

arxiv:1203.0949 v1 · 2012-03-05 · 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{QXQHDWNVYDLITCTSHDGQV3RMK2}

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	2026-05-18T04:00:50.004345Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85e071d9b5c0d6898a7238cd0aee2c5686550411905852b531136e903db61c09

Aliases

arxiv: 1203.0949 · arxiv_version: 1203.0949v1 · doi: 10.48550/arxiv.1203.0949 · pith_short_12: QXQHDWNVYDLI · pith_short_16: QXQHDWNVYDLITCTS · pith_short_8: QXQHDWNV

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/QXQHDWNVYDLITCTSHDGQV3RMK2 \
  | 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: 85e071d9b5c0d6898a7238cd0aee2c5686550411905852b531136e903db61c09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a70b134e2a8d8a0640551abfbbe2eadcd12d4608591fdbfa863f50baf655d948",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2012-03-05T15:42:15Z",
    "title_canon_sha256": "39d1d9bb36f46463ef5843d36bfaa96f5b6d3cc25f80524ce7e37d2f42ebacd7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.0949",
    "kind": "arxiv",
    "version": 1
  }
}