Pith Number

pith:MYFFYD4K

pith:2008:MYFFYD4KACOQ7UAGIBKBZRPCSH

not attested not anchored not stored refs pending

Dry Mergers: A Crucial Test for Galaxy Formation

J. Silk, S. Khochfar

arxiv:0809.1734 v2 · 2008-09-10 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MYFFYD4KACOQ7UAGIBKBZRPCSH}

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	2026-05-18T02:15:35.032757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

660a5c0f8a009d0fd00640541cc5e291da5ac764ed13e7adbc2627dff10b3185

Aliases

arxiv: 0809.1734 · arxiv_version: 0809.1734v2 · doi: 10.48550/arxiv.0809.1734 · pith_short_12: MYFFYD4KACOQ · pith_short_16: MYFFYD4KACOQ7UAG · pith_short_8: MYFFYD4K

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/MYFFYD4KACOQ7UAGIBKBZRPCSH \
  | 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: 660a5c0f8a009d0fd00640541cc5e291da5ac764ed13e7adbc2627dff10b3185

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5d2bab420e3a600d13b65b5462cfb19d54aa8113ee555466621d3961263aa7d8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-10T09:01:27Z",
    "title_canon_sha256": "0652b26f09987e9646be975b7a5455b89984c92cb6d6586eeb873954cfaa8809"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1734",
    "kind": "arxiv",
    "version": 2
  }
}