Pith Number

pith:SQDS6E2I

pith:2001:SQDS6E2IWVKO5RA53BQDN2O3FA

not attested not anchored not stored refs pending

The evolution of the Tully-Fisher relation of spiral galaxies

A. Boehm, A. Gabasch, B. L. Ziegler, C. Moellenhoff, D. Mehlert, E. Sutorius (Landessternwarte Heidelberg), H. Nicklas (Uni.-Sternwarte Goettingen), J. Heidt, K. Jaeger, K. J. Fricke, N. Drory, R. Bender, R. P. Saglia, S. Noll, S. Seitz (Uni.-Sternwarte Muenchen)

arxiv:astro-ph/0111146 v2 · 2001-11-07 · 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{SQDS6E2IWVKO5RA53BQDN2O3FA}

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	2026-07-04T16:24:25.450393Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94072f1348b554eec41dd86036e9db28295c7405fbd79a6967d71c279cb3f52c

Aliases

arxiv: astro-ph/0111146 · arxiv_version: astro-ph/0111146v2 · doi: 10.48550/arxiv.astro-ph/0111146 · pith_short_12: SQDS6E2IWVKO · pith_short_16: SQDS6E2IWVKO5RA5 · pith_short_8: SQDS6E2I

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/SQDS6E2IWVKO5RA53BQDN2O3FA \
  | 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: 94072f1348b554eec41dd86036e9db28295c7405fbd79a6967d71c279cb3f52c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba91423737512e293a5dd7be8720a9aa1bfa7fd4083ca9cc5245047cf38eccdd",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-11-07T13:58:34Z",
    "title_canon_sha256": "2a7c8f1be7f3009a29ed10d88d1f906360ad7acd3fc13ccb1993128b990fb890"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0111146",
    "kind": "arxiv",
    "version": 2
  }
}