Pith Number

pith:U5XGJ37L

pith:1999:U5XGJ37LA6KN7YGUDN55STGAF7

not attested not anchored not stored refs pending

A `warp drive' with more reasonable total energy requirements

Chris Van Den Broeck

arxiv:gr-qc/9905084 v5 · 1999-05-21 · 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{U5XGJ37LA6KN7YGUDN55STGAF7}

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

1 paper in Pith

Steering a warp drive without exotic matter

Receipt and verification

First computed	2026-07-04T16:13:51.373143Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a76e64efeb0794dfe0d41b7bd94cc02fc9ecd6df7dead11ced4035b94dbcc275

Aliases

arxiv: gr-qc/9905084 · arxiv_version: gr-qc/9905084v5 · doi: 10.48550/arxiv.gr-qc/9905084 · pith_short_12: U5XGJ37LA6KN · pith_short_16: U5XGJ37LA6KN7YGU · pith_short_8: U5XGJ37L

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/U5XGJ37LA6KN7YGUDN55STGAF7 \
  | 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: a76e64efeb0794dfe0d41b7bd94cc02fc9ecd6df7dead11ced4035b94dbcc275

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a68ac96191e295b5aa3caa19ad5fe7c481135b18790fea9b3e70be97b93490e8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1999-05-21T12:50:59Z",
    "title_canon_sha256": "5be6b715f40513125473b37347030ec677ba23250c1448481d232d2b9dd3ad16"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9905084",
    "kind": "arxiv",
    "version": 5
  }
}