Pith Number

pith:VLJJZYPZ

pith:2005:VLJJZYPZ7EBE4CP7CB7R2KPYG7

not attested not anchored not stored refs pending

Mapping of electromagnetic negative-phase-velocity propagation in the ergosphere of a rotating black hole

Akhlesh Lakhtakia (Pennsylvania State University), Sandi Setiawan (University of Edinburgh), Tom G. Mackay (University of Edinburgh)

arxiv:astro-ph/0501522 v2 · 2005-01-24 · astro-ph · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VLJJZYPZ7EBE4CP7CB7R2KPYG7}

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	2026-05-18T00:42:44.804785Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aad29ce1f9f9024e09ff107f1d29f837d833d3da32bd6078c9f3ee3cd14aba52

Aliases

arxiv: astro-ph/0501522 · arxiv_version: astro-ph/0501522v2 · doi: 10.48550/arxiv.astro-ph/0501522 · pith_short_12: VLJJZYPZ7EBE · pith_short_16: VLJJZYPZ7EBE4CP7 · pith_short_8: VLJJZYPZ

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/VLJJZYPZ7EBE4CP7CB7R2KPYG7 \
  | 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: aad29ce1f9f9024e09ff107f1d29f837d833d3da32bd6078c9f3ee3cd14aba52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9992176a885ea3997962dbfcd742f3e45b7968b7d1a38cc491d0afb1eb154850",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-01-24T23:13:44Z",
    "title_canon_sha256": "4acb45d193f6b83f265d5be390609260913c42d1ac9b2e664d6edb44b39ddb1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0501522",
    "kind": "arxiv",
    "version": 2
  }
}