Pith Number

pith:76MR6NCA

pith:2012:76MR6NCAPWFY3OVFXNERF363B2

not attested not anchored not stored refs pending

The momentum of an electromagnetic wave inside a dielectric

Massimo Testa

arxiv:1207.3913 v2 · 2012-07-17 · physics.class-ph · hep-th · 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{76MR6NCAPWFY3OVFXNERF363B2}

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	2026-05-18T01:56:17.609371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff991f34407d8b8dbaa5bb4912efdb0e8463a2a9b417430d8d15aff255564cb4

Aliases

arxiv: 1207.3913 · arxiv_version: 1207.3913v2 · doi: 10.48550/arxiv.1207.3913 · pith_short_12: 76MR6NCAPWFY · pith_short_16: 76MR6NCAPWFY3OVF · pith_short_8: 76MR6NCA

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/76MR6NCAPWFY3OVFXNERF363B2 \
  | 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: ff991f34407d8b8dbaa5bb4912efdb0e8463a2a9b417430d8d15aff255564cb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6aa098b619136f0f3ea6a39953a64b5e571679948dc34996bba9f7100314e530",
    "cross_cats_sorted": [
      "hep-th",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2012-07-17T08:40:24Z",
    "title_canon_sha256": "4aae0f0fb32b747fb853e1dc2e80296d17acc01d74779047eab07faa86e7aee4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.3913",
    "kind": "arxiv",
    "version": 2
  }
}