Pith Number

pith:5BELWEW7

pith:2003:5BELWEW74ZGI3JF2CEBGFN65EO

not attested not anchored not stored refs pending

Models of quintessence coupled to the electromagnetic field and the cosmological evolution of alpha

E. J. Copeland, M. Pospelov, N. J. Nunes

arxiv:hep-ph/0307299 v2 · 2003-07-24 · hep-ph · astro-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{5BELWEW74ZGI3JF2CEBGFN65EO}

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	2026-07-04T16:40:49.831682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e848bb12dfe64c8da4ba110262b7dd23a099d4a5b63503bf2b8c48a4350aa0a6

Aliases

arxiv: hep-ph/0307299 · arxiv_version: hep-ph/0307299v2 · doi: 10.48550/arxiv.hep-ph/0307299 · pith_short_12: 5BELWEW74ZGI · pith_short_16: 5BELWEW74ZGI3JF2 · pith_short_8: 5BELWEW7

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/5BELWEW74ZGI3JF2CEBGFN65EO \
  | 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: e848bb12dfe64c8da4ba110262b7dd23a099d4a5b63503bf2b8c48a4350aa0a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcc31e1fdeeead925ebae8d20e0999c48bea089fb92ea447047d80d483d7a31f",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "",
    "primary_cat": "hep-ph",
    "submitted_at": "2003-07-24T07:23:52Z",
    "title_canon_sha256": "9ad9afdc5655c6e29744519570fae1b79902ca254e7cbd618fe286f5ca198478"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-ph/0307299",
    "kind": "arxiv",
    "version": 2
  }
}