Pith Number

pith:NZ6A2NYU

pith:2009:NZ6A2NYUWFGTCTDCFPMYOYNFWM

not attested not anchored not stored refs pending

An Observational Estimate for the Mean Secular Evolution Rate in Spiral Galaxies

H.-W. Rix, K. Foyle, S. Zibetti

arxiv:0911.2231 v2 · 2009-11-11 · 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{NZ6A2NYUWFGTCTDCFPMYOYNFWM}

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	2026-05-18T02:10:48.602005Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e7c0d3714b14d314c622bd98761a5b322f50d381a4187ee42ca221f216ab2a9

Aliases

arxiv: 0911.2231 · arxiv_version: 0911.2231v2 · doi: 10.48550/arxiv.0911.2231 · pith_short_12: NZ6A2NYUWFGT · pith_short_16: NZ6A2NYUWFGTCTDC · pith_short_8: NZ6A2NYU

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/NZ6A2NYUWFGTCTDCFPMYOYNFWM \
  | 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: 6e7c0d3714b14d314c622bd98761a5b322f50d381a4187ee42ca221f216ab2a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6939af828ada08c6fe55d76b415bb337d1d25da4306fd0770cdbf433287472d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-11-11T21:01:47Z",
    "title_canon_sha256": "cc4a91f321b0ee2c81cfdfc7b4ceb08c2c16d0cf65711cc1a0bbcfbb60078688"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2231",
    "kind": "arxiv",
    "version": 2
  }
}