Pith Number

pith:KM4TYDRS

pith:2009:KM4TYDRSFWPEARK4P7E5CBGCFC

not attested not anchored not stored refs pending

The Origin of Color Gradients in Early-Type Systems and Their Compactness at High-z

de Carvalho, F., La Barbera, R.R

arxiv:0905.0791 v1 · 2009-05-06 · 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{KM4TYDRSFWPEARK4P7E5CBGCFC}

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	2026-05-18T02:13:47.190272Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53393c0e322d9e40455c7fc9d104c228af26a4086e57243aee1f2333ae9da402

Aliases

arxiv: 0905.0791 · arxiv_version: 0905.0791v1 · doi: 10.48550/arxiv.0905.0791 · pith_short_12: KM4TYDRSFWPE · pith_short_16: KM4TYDRSFWPEARK4 · pith_short_8: KM4TYDRS

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/KM4TYDRSFWPEARK4P7E5CBGCFC \
  | 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: 53393c0e322d9e40455c7fc9d104c228af26a4086e57243aee1f2333ae9da402

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7ff8c089bbab05f913a432e0c49ee124b291ec24fda05156b8100a03f57ed6d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-06T09:44:43Z",
    "title_canon_sha256": "1824ead77736b3550827183477c44133da7888b3a693802141ddd75f8ee6c362"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0791",
    "kind": "arxiv",
    "version": 1
  }
}