Pith Number

pith:6XWCW3YI

pith:1995:6XWCW3YIDXEEZGPIABJTZHRX2L

not attested not anchored not stored refs pending

Gravitational Instantons in Ashtekar's Formalism

H.Ishihara, H.Kubotani, T.Fukuyama

arxiv:gr-qc/9509009 v1 · 1995-09-06 · gr-qc

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6XWCW3YIDXEEZGPIABJTZHRX2L}

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	2026-05-18T01:39:19.527717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5ec2b6f081dc84c99e800533c9e37d2cd38d53f60cf38a41cf0fd04dc1b41d7

Aliases

arxiv: gr-qc/9509009 · arxiv_version: gr-qc/9509009v1 · doi: 10.48550/arxiv.gr-qc/9509009 · pith_short_12: 6XWCW3YIDXEE · pith_short_16: 6XWCW3YIDXEEZGPI · pith_short_8: 6XWCW3YI

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/6XWCW3YIDXEEZGPIABJTZHRX2L \
  | 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: f5ec2b6f081dc84c99e800533c9e37d2cd38d53f60cf38a41cf0fd04dc1b41d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "572cc56835af984585745bb8747bd2299d5c0e1e253f9cbca1adbf3c7ae98933",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1995-09-06T08:31:18Z",
    "title_canon_sha256": "2b24a983f92ff88c6c65e3d676b01900a7c355a0b464832c4523c388814148bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9509009",
    "kind": "arxiv",
    "version": 1
  }
}