Pith Number

pith:WYDTC4UU

pith:2002:WYDTC4UU7PZZYNFJA2OR4P3ZME

not attested not anchored not stored refs pending

A model independent approach to the dark energy equation of state

E.J. Copeland (University of Sussex), P.S. Corasaniti

arxiv:astro-ph/0205544 v3 · 2002-05-31 · astro-ph · hep-ph · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WYDTC4UU7PZZYNFJA2OR4P3ZME}

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	2026-05-18T04:29:52.686615Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b607317294fbf39c34a9069d1e3f7961249be0fcd29d1ab97605e6ab088aa719

Aliases

arxiv: astro-ph/0205544 · arxiv_version: astro-ph/0205544v3 · doi: 10.48550/arxiv.astro-ph/0205544 · pith_short_12: WYDTC4UU7PZZ · pith_short_16: WYDTC4UU7PZZYNFJ · pith_short_8: WYDTC4UU

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/WYDTC4UU7PZZYNFJA2OR4P3ZME \
  | 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: b607317294fbf39c34a9069d1e3f7961249be0fcd29d1ab97605e6ab088aa719

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "690e48787d5d3072c5c80538e83e5c4ab5d34c8d9cd6e71796c72772ef1f991b",
    "cross_cats_sorted": [
      "hep-ph",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-05-31T10:58:41Z",
    "title_canon_sha256": "fe3ab697691440e1c4c41c3d7b5895efb851af14db34d2d7a7bc575ea6acbd23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0205544",
    "kind": "arxiv",
    "version": 3
  }
}