Pith Number

pith:3ZJT2L7M

pith:2018:3ZJT2L7MB25TUPXZ5UL67TLS22

not attested not anchored not stored refs pending

Spatial variation of fundamental constants: testing models with thermonuclear supernovae

Carolina Negrelli, Enrique Garc\'ia-Berro, Lucila Kraiselburd, Susana J. Landau

arxiv:1804.01521 v1 · 2018-04-04 · 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{3ZJT2L7MB25TUPXZ5UL67TLS22}

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	2026-05-17T23:58:52.874007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

de533d2fec0ebb3a3ef9ed17efcd72d6bea85ba278bbd71993f1deabf0628e7d

Aliases

arxiv: 1804.01521 · arxiv_version: 1804.01521v1 · doi: 10.48550/arxiv.1804.01521 · pith_short_12: 3ZJT2L7MB25T · pith_short_16: 3ZJT2L7MB25TUPXZ · pith_short_8: 3ZJT2L7M

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/3ZJT2L7MB25TUPXZ5UL67TLS22 \
  | 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: de533d2fec0ebb3a3ef9ed17efcd72d6bea85ba278bbd71993f1deabf0628e7d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63122b0dcde338a2eca8faef1a62b92b42f322190b2ee66f6a33c849f5581483",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2018-04-04T17:49:51Z",
    "title_canon_sha256": "c7f297673e3e1f16aa15874af71ff14585739777e35c4a96330edcf6b03f312c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01521",
    "kind": "arxiv",
    "version": 1
  }
}