Pith Number

pith:7UTVFQWF

pith:1997:7UTVFQWFUBZQXABFLIF6HBANC3

not attested not anchored not stored refs pending

First order hyperbolic formalism for Numerical Relativity

Carles Bona, Ed Seidel, Joan Masso, Joan Stela

arxiv:gr-qc/9709016 v1 · 1997-09-07 · 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{7UTVFQWFUBZQXABFLIF6HBANC3}

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	2026-05-18T04:23:46.838715Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd2752c2c5a0730b80255a0be3840d16ecea42acb11f6c81d7176e932c46abdb

Aliases

arxiv: gr-qc/9709016 · arxiv_version: gr-qc/9709016v1 · doi: 10.48550/arxiv.gr-qc/9709016 · pith_short_12: 7UTVFQWFUBZQ · pith_short_16: 7UTVFQWFUBZQXABF · pith_short_8: 7UTVFQWF

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/7UTVFQWFUBZQXABFLIF6HBANC3 \
  | 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: fd2752c2c5a0730b80255a0be3840d16ecea42acb11f6c81d7176e932c46abdb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d035abaee53807f08a82966f1900df751b689c65fcc45fe7255a17569513306f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1997-09-07T16:10:37Z",
    "title_canon_sha256": "a1243142bd5c310284e31b3820187346352d3e9da6c5ef6f9ebba988bf4fb6b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9709016",
    "kind": "arxiv",
    "version": 1
  }
}