Pith Number

pith:G6GXYJMB

pith:1998:G6GXYJMBSXW2ERF5XOBFY2MXPW

not attested not anchored not stored refs pending

Superluminal travel requires negative energies

Ken D. Olum

arxiv:gr-qc/9805003 v2 · 1998-05-01 · 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{G6GXYJMBSXW2ERF5XOBFY2MXPW}

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

Energy conditions in static, spherically symmetric spacetimes and effective geometries

Receipt and verification

First computed	2026-05-18T01:39:18.599455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

378d7c258195eda244bdbb825c69977da0df01936311e6acfabf2de9dd679c12

Aliases

arxiv: gr-qc/9805003 · arxiv_version: gr-qc/9805003v2 · doi: 10.48550/arxiv.gr-qc/9805003 · pith_short_12: G6GXYJMBSXW2 · pith_short_16: G6GXYJMBSXW2ERF5 · pith_short_8: G6GXYJMB

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/G6GXYJMBSXW2ERF5XOBFY2MXPW \
  | 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: 378d7c258195eda244bdbb825c69977da0df01936311e6acfabf2de9dd679c12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e790bc970b9e9125defeb150d5014a77b9ebdcfd71da2fbc0ca8953916026a06",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1998-05-01T19:39:39Z",
    "title_canon_sha256": "bd08e55563f31c188be9649e3575317020fd0e94e2655781af2f8bd0ba1d5ca9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9805003",
    "kind": "arxiv",
    "version": 2
  }
}