Pith Number

pith:BHB3ADOS

pith:2013:BHB3ADOSQ2JRQU55A4XCNEWF7G

not attested not anchored not stored refs pending

The two regimes of the cosmic sSFR evolution are due to spheroids and discs

A. Pipino (ETHZ), F. Calura (INAF-Bologna), F. Matteucci (Univ.Trieste)

arxiv:1304.2939 v1 · 2013-04-10 · 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{BHB3ADOSQ2JRQU55A4XCNEWF7G}

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	2026-05-18T01:50:40.475623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09c3b00dd286931853bd072e2692c5f9983eb26b8a1946898340f29176fdbc74

Aliases

arxiv: 1304.2939 · arxiv_version: 1304.2939v1 · doi: 10.48550/arxiv.1304.2939 · pith_short_12: BHB3ADOSQ2JR · pith_short_16: BHB3ADOSQ2JRQU55 · pith_short_8: BHB3ADOS

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/BHB3ADOSQ2JRQU55A4XCNEWF7G \
  | 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: 09c3b00dd286931853bd072e2692c5f9983eb26b8a1946898340f29176fdbc74

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7801d2af20641d3e3615f9369da827fb915112cc3f27b443a5e00504b426f1ee",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-10T12:46:28Z",
    "title_canon_sha256": "64a2d51559cae8f79cd4b844adcd52970aee85302a27ffbd8d09b130b00d7681"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2939",
    "kind": "arxiv",
    "version": 1
  }
}