Pith Number

pith:QQFNEXAD

pith:2017:QQFNEXAD5CPIG4ZCXYT5GMPUH4

not attested not anchored not stored refs pending

Realizations of some contact metric manifolds as Ricci soliton real hypersurfaces

Akira Kubo, Hiroshi Tamaru, Jong Taek Cho, Takahiro Hashinaga, Yuichiro Taketomi

arxiv:1702.07256 v1 · 2017-02-23 · 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{QQFNEXAD5CPIG4ZCXYT5GMPUH4}

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	2026-05-18T00:21:14.587527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

840ad25c03e89e837322be27d331f43f075a2ec79b70838f31563b1358b796c8

Aliases

arxiv: 1702.07256 · arxiv_version: 1702.07256v1 · doi: 10.48550/arxiv.1702.07256 · pith_short_12: QQFNEXAD5CPI · pith_short_16: QQFNEXAD5CPIG4ZC · pith_short_8: QQFNEXAD

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/QQFNEXAD5CPIG4ZCXYT5GMPUH4 \
  | 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: 840ad25c03e89e837322be27d331f43f075a2ec79b70838f31563b1358b796c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7a0ed43f40ccf6ed4b931a26d1b814822bf1358135ab5666ea707ccce423375",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2017-02-23T15:11:12Z",
    "title_canon_sha256": "256a791b64e3a5baaa1b67ea5649f7b83f43a653b8be71f4d20e93093dd81cee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.07256",
    "kind": "arxiv",
    "version": 1
  }
}