Pith Number

pith:IQDTN6BA

pith:1995:IQDTN6BAPNXSVPIKDR4UQGCHG5

not attested not anchored not stored refs pending

A COMPARATIVE STUDY OF MORPHOLOGICAL CLASSIFICATIONS OF APM GALAXIES

A. Dressler, A. Naim, G. de Vaucouleurs, H. G. Corwin Jr., J. P. Huchra, L. Sodre Jr., M. C. Storrie-Lombardi, O. Lahav, R. J. Buta, S. Raychaudhury, S. van den Bergh

arxiv:astro-ph/9502078 v1 · 1995-02-16 · 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{IQDTN6BAPNXSVPIKDR4UQGCHG5}

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	2026-05-18T01:40:23.786381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

440736f8207b6f2abd0a1c7948184737461ddb2259c034d55413c582cff0566b

Aliases

arxiv: astro-ph/9502078 · arxiv_version: astro-ph/9502078v1 · doi: 10.48550/arxiv.astro-ph/9502078 · pith_short_12: IQDTN6BAPNXS · pith_short_16: IQDTN6BAPNXSVPIK · pith_short_8: IQDTN6BA

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/IQDTN6BAPNXSVPIKDR4UQGCHG5 \
  | 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: 440736f8207b6f2abd0a1c7948184737461ddb2259c034d55413c582cff0566b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51b72136e2d0cc2360c8b5709b9f02dcdafc2ac6cd56da0feabebfc33a6ad255",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-02-16T14:59:00Z",
    "title_canon_sha256": "ced16eac7ed121108378618898f6cd9cf3cc83f00a582d1a015722ddeebd9368"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9502078",
    "kind": "arxiv",
    "version": 1
  }
}