Pith Number

pith:MCW7WHKE

pith:2008:MCW7WHKEDYDFM67LNTGVPPODSR

not attested not anchored not stored refs pending

The Assembly of Supermassive Black Holes at High Redshifts

Takamitsu Tanaka, Zolt\'an Haiman (Columbia University)

arxiv:0807.4702 v2 · 2008-07-29 · 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{MCW7WHKEDYDFM67LNTGVPPODSR}

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	2026-05-18T04:29:33.145818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60adfb1d441e06567beb6ccd57bdc394664a5d48f842c57636a53c50440718bf

Aliases

arxiv: 0807.4702 · arxiv_version: 0807.4702v2 · doi: 10.48550/arxiv.0807.4702 · pith_short_12: MCW7WHKEDYDF · pith_short_16: MCW7WHKEDYDFM67L · pith_short_8: MCW7WHKE

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/MCW7WHKEDYDFM67LNTGVPPODSR \
  | 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: 60adfb1d441e06567beb6ccd57bdc394664a5d48f842c57636a53c50440718bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5153fa3712cb13a3e45c5b1465e7848dc537a985c7bb7b234bb8fa6592a55509",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-07-29T16:34:15Z",
    "title_canon_sha256": "fac29163ed2d635d5df382560dd54e96439e3b97ec82fe0cc34ae4f3d993bb44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.4702",
    "kind": "arxiv",
    "version": 2
  }
}