Pith Number

pith:LPBPTUNI

pith:1992:LPBPTUNI3DKX26TQWYORU32NQZ

not attested not anchored not stored refs pending

Canonical Quantum Gravity and the Problem of Time

Chris J. Isham

arxiv:gr-qc/9210011 v1 · 1992-10-21 · 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{LPBPTUNI3DKX26TQWYORU32NQZ}

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

11 papers in Pith

Quantization of Gravity on Null Hypersurfaces

Wormholes as red herrings: reflection positivity and the reconstruction of unitary quantum field theories

Quantum Reference Fields Transformations in Linearized Quantum Gravity

Diffeomorphism-Invariant Quantities in Phase Space: More than Correlations

Problem of Time and Background Independence: classical version's higher Lie Theory

Receipt and verification

First computed	2026-07-04T14:25:59.052278Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5bc2f9d1a8d8d57d7a70b61d1a6f4d867bf427720ab4a6ed48a156002e37e98d

Aliases

arxiv: gr-qc/9210011 · arxiv_version: gr-qc/9210011v1 · doi: 10.48550/arxiv.gr-qc/9210011 · pith_short_12: LPBPTUNI3DKX · pith_short_16: LPBPTUNI3DKX26TQ · pith_short_8: LPBPTUNI

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/LPBPTUNI3DKX26TQWYORU32NQZ \
  | 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: 5bc2f9d1a8d8d57d7a70b61d1a6f4d867bf427720ab4a6ed48a156002e37e98d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a590e87f40ab2bd3a722f78ff0835223bb7fd43d535419970eee7163f31d304",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1992-10-21T14:54:51Z",
    "title_canon_sha256": "97096a512b6ee10b44e7c88327e3ce478c14fc4cc7390b64cb453ea66cbc4814"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9210011",
    "kind": "arxiv",
    "version": 1
  }
}