Pith Number

pith:EALFNALP

pith:2009:EALFNALPFO2ASE2ZP5ZJUTLO5D

not attested not anchored not stored refs pending

The chemical evolution of galaxies within the IGIMF theory: the [alpha/Fe] ratios and downsizing

Francesco Calura, Pavel Kroupa, Simone Recchi

arxiv:0903.2395 v1 · 2009-03-13 · 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{EALFNALPFO2ASE2ZP5ZJUTLO5D}

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	2026-05-18T02:14:28.499057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

201656816f2bb40913597f729a4d6ee8c8a377f5ea5a931c40983ea9fe79e540

Aliases

arxiv: 0903.2395 · arxiv_version: 0903.2395v1 · doi: 10.48550/arxiv.0903.2395 · pith_short_12: EALFNALPFO2A · pith_short_16: EALFNALPFO2ASE2Z · pith_short_8: EALFNALP

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/EALFNALPFO2ASE2ZP5ZJUTLO5D \
  | 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: 201656816f2bb40913597f729a4d6ee8c8a377f5ea5a931c40983ea9fe79e540

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1934344d891e54592b6450a16f80e3f4dedf287fadb9be907221779062fc2ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-13T14:28:22Z",
    "title_canon_sha256": "bf8b37cc659861df771394c9e265bea3ee178d2dbc86ea89b18dff9800ae5325"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2395",
    "kind": "arxiv",
    "version": 1
  }
}