Pith Number

pith:4I7YLWXJ

pith:2013:4I7YLWXJCP3YSAIT4BHZDGOIHY

not attested not anchored not stored refs pending

Abundance gradients in spiral disks: is the gradient inversion at high redshift real?

A. Mott, E. Spitoni, F. Matteucci

arxiv:1308.1549 v1 · 2013-08-07 · 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{4I7YLWXJCP3YSAIT4BHZDGOIHY}

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	2026-05-18T03:11:46.193988Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e23f85dae913f7890113e04f9199c83e02df0e6a692c774aaf775e6288081cac

Aliases

arxiv: 1308.1549 · arxiv_version: 1308.1549v1 · doi: 10.48550/arxiv.1308.1549 · pith_short_12: 4I7YLWXJCP3Y · pith_short_16: 4I7YLWXJCP3YSAIT · pith_short_8: 4I7YLWXJ

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/4I7YLWXJCP3YSAIT4BHZDGOIHY \
  | 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: e23f85dae913f7890113e04f9199c83e02df0e6a692c774aaf775e6288081cac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85fdb8dab0769325aa99242e5e9d9ed3e0d8c045a6244f44d3a28727880595ff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-08-07T12:30:20Z",
    "title_canon_sha256": "0d6243f81270d93550c768b4676fed5fd589837233988c99d90426c6459ba874"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.1549",
    "kind": "arxiv",
    "version": 1
  }
}