Pith Number

pith:R5LCVL6I

pith:2008:R5LCVL6IHJYMJYFQHW2JQPB42Y

not attested not anchored not stored refs pending

Atomic calculations and search for variation of the fine structure constant in quasar absorption spectra

V. A. Dzuba, V. V. Flambaum

arxiv:0805.0461 v2 · 2008-05-05 · physics.atom-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{R5LCVL6IHJYMJYFQHW2JQPB42Y}

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	2026-05-18T02:15:53.134694Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f562aafc83a70c4e0b03db4983c3cd60bee3d5141f833e7e34d60bb3fc4a742

Aliases

arxiv: 0805.0461 · arxiv_version: 0805.0461v2 · doi: 10.48550/arxiv.0805.0461 · pith_short_12: R5LCVL6IHJYM · pith_short_16: R5LCVL6IHJYMJYFQ · pith_short_8: R5LCVL6I

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/R5LCVL6IHJYMJYFQHW2JQPB42Y \
  | 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: 8f562aafc83a70c4e0b03db4983c3cd60bee3d5141f833e7e34d60bb3fc4a742

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6acd2ec89e223ec2a59b24f5aab1e00154c100a1ef324ed47c081d835413a689",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2008-05-05T05:00:07Z",
    "title_canon_sha256": "d8569e4a6a11fe0ff4d3ab703fa9fc6e66faa52633fb2fb7d7f4f0b6671899a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.0461",
    "kind": "arxiv",
    "version": 2
  }
}