Pith Number

pith:7HWF5NFK

pith:2009:7HWF5NFK2UXIGBHH4IOZUKPDZU

not attested not anchored not stored refs pending

Clues on the origin of galactic angular momentum from looking at galaxy pairs

B. Cervantes-Sodi, Changbom Park, X. Hernandez

arxiv:0908.2486 v2 · 2009-08-18 · astro-ph.GA · 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{7HWF5NFK2UXIGBHH4IOZUKPDZU}

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	2026-05-18T02:12:25.803498Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9ec5eb4aad52e8304e7e21d9a29e3cd0b99385574b2f34dd9b29004c861dd44

Aliases

arxiv: 0908.2486 · arxiv_version: 0908.2486v2 · doi: 10.48550/arxiv.0908.2486 · pith_short_12: 7HWF5NFK2UXI · pith_short_16: 7HWF5NFK2UXIGBHH · pith_short_8: 7HWF5NFK

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/7HWF5NFK2UXIGBHH4IOZUKPDZU \
  | 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: f9ec5eb4aad52e8304e7e21d9a29e3cd0b99385574b2f34dd9b29004c861dd44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9434fb42499f1915188875c77222a973725b04db9b430b8c9240243404dc0364",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-08-18T04:44:51Z",
    "title_canon_sha256": "715b3a444c1625a0613c7c40fe17040ab1f068045e0911bde7076b2cc90c1793"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2486",
    "kind": "arxiv",
    "version": 2
  }
}