Pith Number

pith:BW5W7ANI

pith:2013:BW5W7ANIWHYO4XTOP42X4OZAAY

not attested not anchored not stored refs pending

Analogue gravity in hyperbolic metamaterials

Igor I. Smolyaninov

arxiv:1307.8431 v2 · 2013-07-31 · physics.optics · 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{BW5W7ANIWHYO4XTOP42X4OZAAY}

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	2026-05-18T01:48:32.152728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0dbb6f81a8b1f0ee5e6e7f357e3b20061a210068cb308fe8dad1f7b48927fe36

Aliases

arxiv: 1307.8431 · arxiv_version: 1307.8431v2 · doi: 10.48550/arxiv.1307.8431 · pith_short_12: BW5W7ANIWHYO · pith_short_16: BW5W7ANIWHYO4XTO · pith_short_8: BW5W7ANI

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/BW5W7ANIWHYO4XTOP42X4OZAAY \
  | 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: 0dbb6f81a8b1f0ee5e6e7f357e3b20061a210068cb308fe8dad1f7b48927fe36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60bd9d769f72f225df9e38d36c14801fc0d041fee5b7f57390111ba803aaa073",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2013-07-31T19:18:26Z",
    "title_canon_sha256": "4f98eb0ff74d2370d064cf47a1b6ec4fd50043f1ba88192021114b14ad7963cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.8431",
    "kind": "arxiv",
    "version": 2
  }
}