Pith Number

pith:4PH3MP7A

pith:2009:4PH3MP7A4RAXE2YYMCSRHPYX2Q

not attested not anchored not stored refs pending

Phantom dark energy with varying-mass dark matter particles: acceleration and cosmic coincidence problem

Emmanuel N. Saridakis, Genly Leon

arxiv:0904.1577 v1 · 2009-04-09 · gr-qc · astro-ph.CO · 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{4PH3MP7A4RAXE2YYMCSRHPYX2Q}

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	2026-05-18T02:34:59.840717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3cfb63fe0e441726b1860a513bf17d425841421add9935f6ec4e495f0b02639

Aliases

arxiv: 0904.1577 · arxiv_version: 0904.1577v1 · doi: 10.48550/arxiv.0904.1577 · pith_short_12: 4PH3MP7A4RAX · pith_short_16: 4PH3MP7A4RAXE2YY · pith_short_8: 4PH3MP7A

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/4PH3MP7A4RAXE2YYMCSRHPYX2Q \
  | 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: e3cfb63fe0e441726b1860a513bf17d425841421add9935f6ec4e495f0b02639

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d15bec269e1ec40c3f831ffbd814865bfc1aa6addc4246d5fc52eb1b364d5df",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-04-09T17:53:51Z",
    "title_canon_sha256": "79d0b85014a3a64267994f39725adbce7f7d721b197b5503c3911cc7ad33a6d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1577",
    "kind": "arxiv",
    "version": 1
  }
}