Pith Number

pith:IHIKPUBI

pith:2012:IHIKPUBISAQYYZOYQHQ2MULDVA

not attested not anchored not stored refs pending

Time machines and traversable wormholes in modified theories of gravity

Francisco S. N. Lobo

arxiv:1212.1006 v1 · 2012-12-05 · 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{IHIKPUBISAQYYZOYQHQ2MULDVA}

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	2026-05-18T03:10:14.505220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41d0a7d02890218c65d881e1a65163a80a4436ab8015e5636c8f1b339cecc92a

Aliases

arxiv: 1212.1006 · arxiv_version: 1212.1006v1 · doi: 10.48550/arxiv.1212.1006 · pith_short_12: IHIKPUBISAQY · pith_short_16: IHIKPUBISAQYYZOY · pith_short_8: IHIKPUBI

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/IHIKPUBISAQYYZOYQHQ2MULDVA \
  | 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: 41d0a7d02890218c65d881e1a65163a80a4436ab8015e5636c8f1b339cecc92a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d70a40bf9264befdab266b50fea12ca026062563ba142940763605679372667",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-12-05T12:29:11Z",
    "title_canon_sha256": "5132458f211035cfe7161082a80036d2d14850d87209a0ac907e2a12f2ed9e8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.1006",
    "kind": "arxiv",
    "version": 1
  }
}