Pith Number

pith:35KHHMNL

pith:2019:35KHHMNLFRGOXDR6T2KSWLX2VG

not attested not anchored not stored refs pending

Fourier-series expansion of the dark-energy equation of state

David Tamayo, J. Alberto Vazquez

arxiv:1901.08679 v2 · 2019-01-24 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{35KHHMNLFRGOXDR6T2KSWLX2VG}

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	2026-05-17T23:43:09.132909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df5473b1ab2c4ceb8e3e9e952b2efaa981272c79e59dd0ecf612fa4a7782c20e

Aliases

arxiv: 1901.08679 · arxiv_version: 1901.08679v2 · doi: 10.48550/arxiv.1901.08679 · pith_short_12: 35KHHMNLFRGO · pith_short_16: 35KHHMNLFRGOXDR6 · pith_short_8: 35KHHMNL

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/35KHHMNLFRGOXDR6T2KSWLX2VG \
  | 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: df5473b1ab2c4ceb8e3e9e952b2efaa981272c79e59dd0ecf612fa4a7782c20e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18fa3844745fd01e549e67cb309a1dd7aa928a365365bb2a2fbc4dde4e54e4b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-01-24T23:12:29Z",
    "title_canon_sha256": "729212876dbe58bed5c267a96a3961e9885ba7490150ccf1c02f5da195a21501"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.08679",
    "kind": "arxiv",
    "version": 2
  }
}