Pith Number

pith:T7HPPMNV

pith:2013:T7HPPMNVWGAKVDJH6LUGNKR5HK

not attested not anchored not stored refs pending

Spatial variations of the fine-structure constant in symmetron models

C. J. A. P. Martins, David F. Mota, Hans A. Winther, Marvin F. Silva

arxiv:1310.2152 v1 · 2013-10-08 · 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{T7HPPMNVWGAKVDJH6LUGNKR5HK}

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	2026-05-18T03:00:58.411118Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fcef7b1b5b180aa8d27f2e866aa3d3a822bbb0f72b04a3be363c2fc79c7b4dd

Aliases

arxiv: 1310.2152 · arxiv_version: 1310.2152v1 · doi: 10.48550/arxiv.1310.2152 · pith_short_12: T7HPPMNVWGAK · pith_short_16: T7HPPMNVWGAKVDJH · pith_short_8: T7HPPMNV

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/T7HPPMNVWGAKVDJH6LUGNKR5HK \
  | 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: 9fcef7b1b5b180aa8d27f2e866aa3d3a822bbb0f72b04a3be363c2fc79c7b4dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a804c2891ab4eb4ef2b2d7b024310f956fe380bdb264351803083e7dc66adb11",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-10-08T14:31:17Z",
    "title_canon_sha256": "d4c09e06840312db9853fd538d0fc6fe925d6451576fbf66d2bc5faf70fd1e52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.2152",
    "kind": "arxiv",
    "version": 1
  }
}