Pith Number

pith:UU5X732U

pith:1999:UU5X732UGYPWXYIPD2CKNIS4ZS

not attested not anchored not stored refs pending

Bondi-type systems near space-like and null infinity

Helmut Friedrich, Janos Kannar

arxiv:gr-qc/9911103 v1 · 1999-11-26 · 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{UU5X732UGYPWXYIPD2CKNIS4ZS}

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	2026-05-18T00:34:16.682653Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a53b7fef54361f6be10f1e84a6a25cccaacf71089b7f573686dfc8845b62ec36

Aliases

arxiv: gr-qc/9911103 · arxiv_version: gr-qc/9911103v1 · doi: 10.48550/arxiv.gr-qc/9911103 · pith_short_12: UU5X732UGYPW · pith_short_16: UU5X732UGYPWXYIP · pith_short_8: UU5X732U

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/UU5X732UGYPWXYIPD2CKNIS4ZS \
  | 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: a53b7fef54361f6be10f1e84a6a25cccaacf71089b7f573686dfc8845b62ec36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f75116f7c7c090e151a90ffd771390373d7b1116d4aa86119b722454c82dc451",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1999-11-26T10:57:37Z",
    "title_canon_sha256": "5089da10355e6967020561f5725c20b85c7a13d8cf133061afc3c69798f9544f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9911103",
    "kind": "arxiv",
    "version": 1
  }
}