Pith Number

pith:AFHL4GYS

pith:1997:AFHL4GYSBTRH3HPKAYWTVAJ4OJ

not attested not anchored not stored refs pending

Cloning Hubble Deep Fields: A Model-Independent Measurement of Galaxy Evolution

Joseph Silk (UC Berkeley), Rychard J. Bouwens, Tom Broadhurst

arxiv:astro-ph/9710291 v2 · 1997-10-26 · 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{AFHL4GYSBTRH3HPKAYWTVAJ4OJ}

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	2026-05-18T01:40:16.568374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

014ebe1b120ce27d9dea062d3a813c724f3856fae3f2bb59eb82066e576bd114

Aliases

arxiv: astro-ph/9710291 · arxiv_version: astro-ph/9710291v2 · doi: 10.48550/arxiv.astro-ph/9710291 · pith_short_12: AFHL4GYSBTRH · pith_short_16: AFHL4GYSBTRH3HPK · pith_short_8: AFHL4GYS

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/AFHL4GYSBTRH3HPKAYWTVAJ4OJ \
  | 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: 014ebe1b120ce27d9dea062d3a813c724f3856fae3f2bb59eb82066e576bd114

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f313d9a8dd4d9e2e4a3570c377fef7d278c8e0d40611424b0506d9808f2ff76d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-10-26T16:04:54Z",
    "title_canon_sha256": "6ddd6b215a92bb5d088163f8e45323d389ae93f907e96fb06bed7cbfd583e0c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9710291",
    "kind": "arxiv",
    "version": 2
  }
}