Pith Number

pith:ZEYSMFDO

pith:2008:ZEYSMFDOJI7RA2XQBZTHELQMPI

not attested not anchored not stored refs pending

Backwards on Minkowski's road. From 4D to 3D Maxwellian electromagnetism

Institute of Mathematics, The Hebrew University of Jerusalem), Y. Friedman (Jerusalem College of Technology, Y. Itin

arxiv:0807.2625 v1 · 2008-07-16 · gr-qc · cond-mat.mtrl-sci · physics.class-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{ZEYSMFDOJI7RA2XQBZTHELQMPI}

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	2026-05-18T03:31:42.027875Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c93126146e4a3f106af00e66722e0c7a00f91d2679b5d3050ec9178cbaf71e7a

Aliases

arxiv: 0807.2625 · arxiv_version: 0807.2625v1 · doi: 10.48550/arxiv.0807.2625 · pith_short_12: ZEYSMFDOJI7R · pith_short_16: ZEYSMFDOJI7RA2XQ · pith_short_8: ZEYSMFDO

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/ZEYSMFDOJI7RA2XQBZTHELQMPI \
  | 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: c93126146e4a3f106af00e66722e0c7a00f91d2679b5d3050ec9178cbaf71e7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa40f65ba93115790df694831f715024da28fc8c115df5bb7df86943d87790c0",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci",
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2008-07-16T18:22:32Z",
    "title_canon_sha256": "915168a040634c1a448061453df8ac4c7da9e0ad5f87f237196406e58b97f2b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.2625",
    "kind": "arxiv",
    "version": 1
  }
}