Pith Number

pith:UP2CCETQ

pith:2011:UP2CCETQZQE3PG7DDLVDCCEGIG

not attested not anchored not stored refs pending

Practical Limitations on Astrophysical Observations of Methanol to Investigate Variations in the Proton-to-Electron Mass Ratio

Maxim Voronkov, Shari Breen, Simon Ellingsen

arxiv:1111.4708 v1 · 2011-11-21 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UP2CCETQZQE3PG7DDLVDCCEGIG}

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	2026-05-18T01:59:28.779364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3f4211270cc09b79be31aea31088641a1aaf38cb83bd60a1b99d0cbdf22f27d

Aliases

arxiv: 1111.4708 · arxiv_version: 1111.4708v1 · doi: 10.48550/arxiv.1111.4708 · pith_short_12: UP2CCETQZQE3 · pith_short_16: UP2CCETQZQE3PG7D · pith_short_8: UP2CCETQ

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/UP2CCETQZQE3PG7DDLVDCCEGIG \
  | 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: a3f4211270cc09b79be31aea31088641a1aaf38cb83bd60a1b99d0cbdf22f27d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79f09323856d8c77a354e005c6f4a9ac17a9230b9b63f592f8e4abf3e5b030a4",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-11-21T00:44:59Z",
    "title_canon_sha256": "8e682c4d29a8c94911d55bee456cbe191d01c851c148174091521860f3d5245b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.4708",
    "kind": "arxiv",
    "version": 1
  }
}