Pith Number

pith:ITSA2SQV

pith:2011:ITSA2SQVY4ORHX2V3CFH6KDPKV

not attested not anchored not stored refs pending

A spacetime not characterised by its invariants is of aligned type II

Sigbjorn Hervik

arxiv:1109.2551 v1 · 2011-09-12 · gr-qc · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ITSA2SQVY4ORHX2V3CFH6KDPKV}

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.

Cited by

1 paper in Pith

Locally Boost Isotropic Spacetimes and the Type ${\bf D}^k$ Condition

Receipt and verification

First computed	2026-05-18T02:00:34.192409Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44e40d4a15c71d13df55d88a7f286f5562aaf90c645c29495ba3b2dc8131d5f6

Aliases

arxiv: 1109.2551 · arxiv_version: 1109.2551v1 · doi: 10.48550/arxiv.1109.2551 · pith_short_12: ITSA2SQVY4OR · pith_short_16: ITSA2SQVY4ORHX2V · pith_short_8: ITSA2SQV

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/ITSA2SQVY4ORHX2V3CFH6KDPKV \
  | 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: 44e40d4a15c71d13df55d88a7f286f5562aaf90c645c29495ba3b2dc8131d5f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12eb87028c42f74a65b00b7543f084be92f914d9ecabb5dd7f39eda46b5bcda7",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-09-12T18:05:38Z",
    "title_canon_sha256": "293cd7e8e63fcaae37ebc831e04f1c0fc2724c842d9469c5a25a98797361f19f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2551",
    "kind": "arxiv",
    "version": 1
  }
}