Pith Number

pith:6M53WDB6

pith:2009:6M53WDB6GQJXG4N7KWWMZ3U3BT

not attested not anchored not stored refs pending

Active Exterior Cloaking

Daniel Onofrei, Fernando Guevara Vasquez, Graeme W. Milton

arxiv:0906.1544 v1 · 2009-06-08 · math-ph · math.MP · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6M53WDB6GQJXG4N7KWWMZ3U3BT}

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	2026-05-18T01:59:51.077224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f33bbb0c3e34137371bf55acccee9b0ce26553cca8dd00df8508a7743ae287df

Aliases

arxiv: 0906.1544 · arxiv_version: 0906.1544v1 · doi: 10.48550/arxiv.0906.1544 · pith_short_12: 6M53WDB6GQJX · pith_short_16: 6M53WDB6GQJXG4N7 · pith_short_8: 6M53WDB6

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/6M53WDB6GQJXG4N7KWWMZ3U3BT \
  | 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: f33bbb0c3e34137371bf55acccee9b0ce26553cca8dd00df8508a7743ae287df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c5f1ac3e58a04b0aa1578d8072182d1bb47c6d1051c5b9690c7c33cc1d59538",
    "cross_cats_sorted": [
      "math.MP",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2009-06-08T17:30:48Z",
    "title_canon_sha256": "7e203359a8876868acd4f669945a1a3fef8766bf1806c24e76c283acacde6cda"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1544",
    "kind": "arxiv",
    "version": 1
  }
}