Pith Number

pith:7JD7S4JT

pith:1997:7JD7S4JTJFC4SMFWVOMQG3DD4K

not attested not anchored not stored refs pending

Indication of Anisotropy in Electromagnetic Propagation over Cosmological Distances

Borge Nodland, John P. Ralston

arxiv:astro-ph/9704196 v1 · 1997-04-20 · astro-ph · hep-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{7JD7S4JTJFC4SMFWVOMQG3DD4K}

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.

Cited by

1 paper in Pith

3-form dark energy and cosmic birefringence

Receipt and verification

First computed	2026-07-04T15:21:30.324327Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa47f971334945c930b6ab99036c63e29ef4687cb4064adb53c02724076d8235

Aliases

arxiv: astro-ph/9704196 · arxiv_version: astro-ph/9704196v1 · doi: 10.48550/arxiv.astro-ph/9704196 · pith_short_12: 7JD7S4JTJFC4 · pith_short_16: 7JD7S4JTJFC4SMFW · pith_short_8: 7JD7S4JT

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/7JD7S4JTJFC4SMFWVOMQG3DD4K \
  | 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: fa47f971334945c930b6ab99036c63e29ef4687cb4064adb53c02724076d8235

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf5c72bbda2cc143e88126eeaa601c8cc1a55537b2fe7a1d6e33b76a8c39f035",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-04-20T19:49:07Z",
    "title_canon_sha256": "97f9536b02993d04cd4278642f52e0ce3f8af3a1e6674bdf26a5f8e2ade92810"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9704196",
    "kind": "arxiv",
    "version": 1
  }
}