Pith Number

pith:HYQSHH57

pith:2009:HYQSHH57QIXT4SLYA664CYVEAZ

not attested not anchored not stored refs pending

Towards a direct measurement of vacuum magnetic birefringence: PVLAS achievements

E. Milotti, F. Della Valle, G. Di Domenico, G. Ruoso, G. Zavattini, R. Pengo, U. Gastaldi

arxiv:0907.2642 v1 · 2009-07-15 · physics.optics · physics.gen-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HYQSHH57QIXT4SLYA664CYVEAZ}

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	2026-05-18T02:13:02.730418Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e21239fbf822f3e497807bdc162a4064f82679f2fb069f183e5b72a74482204

Aliases

arxiv: 0907.2642 · arxiv_version: 0907.2642v1 · doi: 10.48550/arxiv.0907.2642 · pith_short_12: HYQSHH57QIXT · pith_short_16: HYQSHH57QIXT4SLY · pith_short_8: HYQSHH57

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/HYQSHH57QIXT4SLYA664CYVEAZ \
  | 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: 3e21239fbf822f3e497807bdc162a4064f82679f2fb069f183e5b72a74482204

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2336e3b7fde2966fd40786494c7c848681e368991fb15de7b85c471fa2330808",
    "cross_cats_sorted": [
      "physics.gen-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-07-15T19:19:06Z",
    "title_canon_sha256": "ccf68b8b11c37c563e57f0bd1e23ec95b4945aa34307c9921c22300956b9eb97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.2642",
    "kind": "arxiv",
    "version": 1
  }
}