Pith Number

pith:XYPGBCY4

pith:2008:XYPGBCY4DCCBBYABKJCEB4QVT3

not attested not anchored not stored refs pending

Can cosmological observations uniquely determine the nature of dark energy ?

Sanil Unnikrishnan

arxiv:0805.0578 v4 · 2008-05-05 · astro-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XYPGBCY4DCCBBYABKJCEB4QVT3}

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

Constraints on non-canonical chaotic inflation from ACT DR6 and BICEP/Keck data

Receipt and verification

First computed	2026-07-04T15:38:16.001621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be1e608b1c188410e001524440f2159effd765a501275906bd6f2d405cffaec7

Aliases

arxiv: 0805.0578 · arxiv_version: 0805.0578v4 · doi: 10.48550/arxiv.0805.0578 · pith_short_12: XYPGBCY4DCCB · pith_short_16: XYPGBCY4DCCBBYAB · pith_short_8: XYPGBCY4

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/XYPGBCY4DCCBBYABKJCEB4QVT3 \
  | 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: be1e608b1c188410e001524440f2159effd765a501275906bd6f2d405cffaec7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "148e61d28b6120b61c82d3ac7f5e369faacf9be61328b48f1e49c596dd684fcc",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-05-05T17:50:44Z",
    "title_canon_sha256": "c83fb1d75f61f3e352bdf349057a88631e7e962a57b6372029f61f14a0c0b298"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.0578",
    "kind": "arxiv",
    "version": 4
  }
}