Pith Number

pith:NLD25GMQ

pith:2017:NLD25GMQ4P27L75PYWRB5UM2VR

not attested not anchored not stored refs pending

Ricci-flat metrics on the cone over $\mathbb{CP}^2 \# \overline{\mathbb{CP}^2}$

Dmitri Bykov

arxiv:1712.07227 v1 · 2017-12-19 · hep-th · gr-qc · 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{NLD25GMQ4P27L75PYWRB5UM2VR}

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	2026-05-18T00:27:35.168941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ac7ae9990e3f5f5ffafc5a21ed19aac6e93be281da47c90f27e8616036929df

Aliases

arxiv: 1712.07227 · arxiv_version: 1712.07227v1 · doi: 10.48550/arxiv.1712.07227 · pith_short_12: NLD25GMQ4P27 · pith_short_16: NLD25GMQ4P27L75P · pith_short_8: NLD25GMQ

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/NLD25GMQ4P27L75PYWRB5UM2VR \
  | 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: 6ac7ae9990e3f5f5ffafc5a21ed19aac6e93be281da47c90f27e8616036929df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1e8873a65f39b1ffaadecd095b03fff57c447bf769a34e39dba39f0b58cb5da",
    "cross_cats_sorted": [
      "gr-qc",
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2017-12-19T21:40:32Z",
    "title_canon_sha256": "847f8e20ce4cfae2b51bd9b4ba81f89e74e23c028963b676b30b0585e60d368f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.07227",
    "kind": "arxiv",
    "version": 1
  }
}