Pith Number

pith:NTX2SSJU

pith:1995:NTX2SSJUACKTTTXL2YPKLXAZZW

not attested not anchored not stored refs pending

Disk galaxies at Z=0 and at High Redshift: an explanation of the observed evolution of damped Ly-alpha systems

Garching), Guinevere Kauffmann (MPA

arxiv:astro-ph/9512123 v1 · 1995-12-19 · 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{NTX2SSJUACKTTTXL2YPKLXAZZW}

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	2026-05-18T01:40:22.078552Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6cefa94934009539ceebd61ea5dc19cdbd0e6699d0aa83bb738f6f120ec4049e

Aliases

arxiv: astro-ph/9512123 · arxiv_version: astro-ph/9512123v1 · doi: 10.48550/arxiv.astro-ph/9512123 · pith_short_12: NTX2SSJUACKT · pith_short_16: NTX2SSJUACKTTTXL · pith_short_8: NTX2SSJU

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/NTX2SSJUACKTTTXL2YPKLXAZZW \
  | 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: 6cefa94934009539ceebd61ea5dc19cdbd0e6699d0aa83bb738f6f120ec4049e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4dab907906e8c59fa556b4148d5c324dfb5d83efecbfd8a106eb433d443882b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-12-19T12:04:51Z",
    "title_canon_sha256": "2faea57f8b6e06781ad011d832072d47fdd200c39f8292f9f81605abb3e0f391"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9512123",
    "kind": "arxiv",
    "version": 1
  }
}