Pith Number

pith:KRAD3ZJF

pith:2009:KRAD3ZJF4KBWEZH6EWMDGLFG2B

not attested not anchored not stored refs pending

The Faint End of the Quasar Luminosity Function at z~4

2), Arjun Dey (4), Ashish Mahabal (1), Buell T. Jannuzi (4), Daniel Stern (3), Eilat Glikman (1, Milan Bogosavljevic (1), S. G. Djorgovski (1)

arxiv:0912.2799 v1 · 2009-12-15 · 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{KRAD3ZJF4KBWEZH6EWMDGLFG2B}

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	2026-05-18T02:33:56.504008Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54403de525e2836264fe2598332ca6d06a5369e7e44f98548bbcefcc5e101d4e

Aliases

arxiv: 0912.2799 · arxiv_version: 0912.2799v1 · doi: 10.48550/arxiv.0912.2799 · pith_short_12: KRAD3ZJF4KBW · pith_short_16: KRAD3ZJF4KBWEZH6 · pith_short_8: KRAD3ZJF

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/KRAD3ZJF4KBWEZH6EWMDGLFG2B \
  | 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: 54403de525e2836264fe2598332ca6d06a5369e7e44f98548bbcefcc5e101d4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12ce38b98e9fd5a45f8e3339aa401917d37939559e244f92a9ba37c5b5718680",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-15T05:14:26Z",
    "title_canon_sha256": "50f6f0b49611fd5261f5a91443b2ac1a40cc2b4cdcb284c978b158fb93371560"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2799",
    "kind": "arxiv",
    "version": 1
  }
}