Pith Number

pith:V73XV6BP

pith:2002:V73XV6BPQXEPFU43QKHVDWZTYJ

not attested not anchored not stored refs pending

Weak energy condition violation and superluminal travel

Francisco Lobo, Paulo Crawford

arxiv:gr-qc/0204038 v2 · 2002-04-09 · 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{V73XV6BPQXEPFU43QKHVDWZTYJ}

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

The Warp Drive: Superluminal Travel within General Relativity

Receipt and verification

First computed	2026-07-05T04:59:36.113843Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aff77af82f85c8f2d39b828f51db33c255c36f4f5c94b1391dda40a5f95f54bd

Aliases

arxiv: gr-qc/0204038 · arxiv_version: gr-qc/0204038v2 · doi: 10.48550/arxiv.gr-qc/0204038 · pith_short_12: V73XV6BPQXEP · pith_short_16: V73XV6BPQXEPFU43 · pith_short_8: V73XV6BP

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/V73XV6BPQXEPFU43QKHVDWZTYJ \
  | 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: aff77af82f85c8f2d39b828f51db33c255c36f4f5c94b1391dda40a5f95f54bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24c3e7516a94577c87011b7d5d29b8e4ebb9ff9bd077ec07ad837c73c3f9411e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2002-04-09T19:51:35Z",
    "title_canon_sha256": "7dcabf36c71910300437dc98800a14a607002af73a2ba5d10093b3509782a54e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0204038",
    "kind": "arxiv",
    "version": 2
  }
}