Pith Number

pith:KCGSKPLP

pith:2009:KCGSKPLPEPEOICNGHM25BL4NLB

not attested not anchored not stored refs pending

Galactic Disk Formation and the Angular Momentum Problem

Andreas Burkert (USM, Munich)

arxiv:0908.1409 v1 · 2009-08-10 · 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{KCGSKPLPEPEOICNGHM25BL4NLB}

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	2026-07-04T15:47:40.848490Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

508d253d6f23c8e409a63b35d0af8d5855ebf6b146ff580363f3ebf3afdf5795

Aliases

arxiv: 0908.1409 · arxiv_version: 0908.1409v1 · doi: 10.48550/arxiv.0908.1409 · pith_short_12: KCGSKPLPEPEO · pith_short_16: KCGSKPLPEPEOICNG · pith_short_8: KCGSKPLP

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/KCGSKPLPEPEOICNGHM25BL4NLB \
  | 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: 508d253d6f23c8e409a63b35d0af8d5855ebf6b146ff580363f3ebf3afdf5795

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94e530b4e9d26dc38ee24d81347b7b2e50f50d4ea569c686a501c2640d41d626",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-10T21:22:51Z",
    "title_canon_sha256": "04c446a294251ca6ef61df7ddfeb7618fe07a708e6e8a0543cd8566aaf82b451"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1409",
    "kind": "arxiv",
    "version": 1
  }
}