Pith Number

pith:P66PH4TC

pith:2002:P66PH4TCEKSQGGSGA7OEJPSXYS

not attested not anchored not stored refs pending

Hyperbolicity of the BSSN system of Einstein evolution equations

Gioel Calabrese, Jorge Pullin, Manuel Tiglio, Olivier Sarbach

arxiv:gr-qc/0205064 v1 · 2002-05-15 · 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{P66PH4TCEKSQGGSGA7OEJPSXYS}

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	2026-07-04T16:33:44.277176Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fbcf3f26222a5031a4607dc44be57c4bf15c3542e3ef2f394f176acae628d43

Aliases

arxiv: gr-qc/0205064 · arxiv_version: gr-qc/0205064v1 · doi: 10.48550/arxiv.gr-qc/0205064 · pith_short_12: P66PH4TCEKSQ · pith_short_16: P66PH4TCEKSQGGSG · pith_short_8: P66PH4TC

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/P66PH4TCEKSQGGSGA7OEJPSXYS \
  | 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: 7fbcf3f26222a5031a4607dc44be57c4bf15c3542e3ef2f394f176acae628d43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5f1de9ec2f1da574a92ec46ba272df781bf58143ad2134ea8c3c286bb42d41f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2002-05-15T22:46:14Z",
    "title_canon_sha256": "8787aba9e9be228b4c880fc625767a032e44622e210908c8e14c1d1914ed7932"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0205064",
    "kind": "arxiv",
    "version": 1
  }
}