Pith Number

pith:67BIX2QF

pith:1997:67BIX2QFH5MTQ3SLNPFTRMMMSC

not attested not anchored not stored refs pending

Quantum Gravity and Regge Calculus

Giorgio Immirzi

arxiv:gr-qc/9701052 v1 · 1997-01-23 · 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{67BIX2QFH5MTQ3SLNPFTRMMMSC}

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

3 papers in Pith

Periodic orbits as probes of charged loop quantum gravity black holes through gravitational waves

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A$^*$

Quasinormal modes of black holes: from astrophysics to string theory

Receipt and verification

First computed	2026-07-04T16:04:35.930983Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7c28bea053f59386e4b6bcb38b18c909f9c7f05de05227bccac7fde033427d4

Aliases

arxiv: gr-qc/9701052 · arxiv_version: gr-qc/9701052v1 · doi: 10.48550/arxiv.gr-qc/9701052 · pith_short_12: 67BIX2QFH5MT · pith_short_16: 67BIX2QFH5MTQ3SL · pith_short_8: 67BIX2QF

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/67BIX2QFH5MTQ3SLNPFTRMMMSC \
  | 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: f7c28bea053f59386e4b6bcb38b18c909f9c7f05de05227bccac7fde033427d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b1db13dd0b3ae43fd743e78233e6fa8f9ed8ac505837de9298c430e9fb0ab87",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1997-01-23T17:38:44Z",
    "title_canon_sha256": "39b851e17852b3d70b42f0c1e0b5aa0787bf748ba7a4838d37a27cccf5999ef3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9701052",
    "kind": "arxiv",
    "version": 1
  }
}