Pith Number

pith:5LEMOLFB

pith:2000:5LEMOLFBUUUIYWVWQKOTHVXLJI

not attested not anchored not stored refs pending

How to Extract Energy Directly from a Gravitational Field

Brazil), Fran De Aquino (Maranhao State University

arxiv:gr-qc/0007069 v1 · 2000-07-25 · 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{5LEMOLFBUUUIYWVWQKOTHVXLJI}

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	2026-05-18T02:37:36.439920Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eac8c72ca1a5288c5ab6829d33d6eb4a078448233f03c3c48ceb18d4e11dea94

Aliases

arxiv: gr-qc/0007069 · arxiv_version: gr-qc/0007069v1 · doi: 10.48550/arxiv.gr-qc/0007069 · pith_short_12: 5LEMOLFBUUUI · pith_short_16: 5LEMOLFBUUUIYWVW · pith_short_8: 5LEMOLFB

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/5LEMOLFBUUUIYWVWQKOTHVXLJI \
  | 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: eac8c72ca1a5288c5ab6829d33d6eb4a078448233f03c3c48ceb18d4e11dea94

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b5efbd0ddc288055d250e283bd885cbf3251a53e37f93f652f186478053d6d8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2000-07-25T19:51:44Z",
    "title_canon_sha256": "0be703dcbec006120ccadbb06b692dca0a32f3b8b856237c9c72d24cfdc2c20e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0007069",
    "kind": "arxiv",
    "version": 1
  }
}