Pith Number

pith:VNMMGF3G

pith:2011:VNMMGF3GG2J4OBLEHRM3WWGP5M

not attested not anchored not stored refs pending

Constraining Variations in the Fine Structure Constant in the presence of Early Dark Energy

Alessandro Melchiorri, C.J.A.P. Martins, Eloisa Menegoni, Erminia Calabrese, Graca Rocha

arxiv:1104.0760 v1 · 2011-04-05 · 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{VNMMGF3GG2J4OBLEHRM3WWGP5M}

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	2026-05-18T04:16:11.834803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab58c317663693c705643c59bb58cfeb27217e59f58b8b24131358fffc18f3ec

Aliases

arxiv: 1104.0760 · arxiv_version: 1104.0760v1 · doi: 10.48550/arxiv.1104.0760 · pith_short_12: VNMMGF3GG2J4 · pith_short_16: VNMMGF3GG2J4OBLE · pith_short_8: VNMMGF3G

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/VNMMGF3GG2J4OBLEHRM3WWGP5M \
  | 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: ab58c317663693c705643c59bb58cfeb27217e59f58b8b24131358fffc18f3ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc3680c01e529490ef8b80d46f76f5ade4e0f758636a1a28a3a25e8d9b4397c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-05T08:10:31Z",
    "title_canon_sha256": "d88f2e5fbce54706acdbd41ae4a6fc67040ea95a3e647bbae73418180f1755d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.0760",
    "kind": "arxiv",
    "version": 1
  }
}