Pith Number

pith:NC4WF2DU

pith:2013:NC4WF2DU7DIZUD7MJIYZOTFQWP

not attested not anchored not stored refs pending

Varying constants and dark energy with the E-ELT

C.J.A.P. Martins, P.E. Vielzeuf

arxiv:1309.7771 v1 · 2013-09-30 · astro-ph.CO · gr-qc · hep-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{NC4WF2DU7DIZUD7MJIYZOTFQWP}

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	2026-05-18T03:11:48.316785Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68b962e874f8d19a0fec4a31974cb0b3db73bbf3d5c795ea9addb5a0c4a0a506

Aliases

arxiv: 1309.7771 · arxiv_version: 1309.7771v1 · doi: 10.48550/arxiv.1309.7771 · pith_short_12: NC4WF2DU7DIZ · pith_short_16: NC4WF2DU7DIZUD7M · pith_short_8: NC4WF2DU

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/NC4WF2DU7DIZUD7MJIYZOTFQWP \
  | 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: 68b962e874f8d19a0fec4a31974cb0b3db73bbf3d5c795ea9addb5a0c4a0a506

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d0c9c413e99e4110dc0e9648e282c7bbac9b0817299dfc3f5563120644760f7",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-30T09:34:54Z",
    "title_canon_sha256": "1e38353341bf1187fa06c0f5ea6692e00b51402df9099cf7293194f6c674dfc9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.7771",
    "kind": "arxiv",
    "version": 1
  }
}