Pith Number

pith:QWGSNHN3

pith:2013:QWGSNHN3SVGYLPFOI7TRRCL5S3

not attested not anchored not stored refs pending

Star formation efficiency and flattened gradients in M31

F. Robles-Valdez, L. Carigi, M. Peimbert

arxiv:1310.1420 v4 · 2013-10-04 · astro-ph.CO · astro-ph.GA

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Receipt and verification

First computed	2026-05-18T02:50:22.888403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858d269dbb954d85bcae47e718897d96ff6e93a63b44270316fc46cabf775dc3

Aliases

arxiv: 1310.1420 · arxiv_version: 1310.1420v4 · doi: 10.48550/arxiv.1310.1420

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/QWGSNHN3SVGYLPFOI7TRRCL5S3 \
  | 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: 858d269dbb954d85bcae47e718897d96ff6e93a63b44270316fc46cabf775dc3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a718516ccb14a967a0119b56e7bcd1ec374f5ac141a065799200adc4d4fc5626",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-10-04T22:46:32Z",
    "title_canon_sha256": "e93b8b303f9bd32c27e37d25252716cc9a076ff349f07ede5a71bb9461d02219"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.1420",
    "kind": "arxiv",
    "version": 4
  }
}