Pith Number

pith:PRBO7M5B

pith:2018:PRBO7M5BS35ZHJN4ZY6Y4BOBYM

not attested not anchored not stored refs pending

Negative permeability in magnetostatics and its experimental demonstration

Albert Parra, Alvaro Sanchez, Carles Navau, Jordi Prat-Camps, Rosa Mach-Batlle, Sergi Laut

arxiv:1803.08013 v1 · 2018-03-21 · cond-mat.mtrl-sci · physics.app-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PRBO7M5BS35ZHJN4ZY6Y4BOBYM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:20:28.263038Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c42efb3a196fb93a5bcce3d8e05c1c3272cb0cfeeb4bfff79fd437e4a6c9628

Aliases

arxiv: 1803.08013 · arxiv_version: 1803.08013v1 · doi: 10.48550/arxiv.1803.08013 · pith_short_12: PRBO7M5BS35Z · pith_short_16: PRBO7M5BS35ZHJN4 · pith_short_8: PRBO7M5B

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/PRBO7M5BS35ZHJN4ZY6Y4BOBYM \
  | 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: 7c42efb3a196fb93a5bcce3d8e05c1c3272cb0cfeeb4bfff79fd437e4a6c9628

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd85d2cfd4f097bd1a2588daf7613b1a830766df1b81b828700062b15338792a",
    "cross_cats_sorted": [
      "physics.app-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2018-03-21T17:06:08Z",
    "title_canon_sha256": "3e1b2e8567298fe15b65037026743c6fd300ac9f9b661a87adf38978593111aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.08013",
    "kind": "arxiv",
    "version": 1
  }
}