Pith Number

pith:GF4OL7RD

pith:2011:GF4OL7RDGEMWVE46FNUNMV7GYE

not attested not anchored not stored refs pending

Relationship between Hubble type and spectroscopic class in local galaxies

2), (2) Departamento de Astrofisica, (3) Paris-Meudon Observatory 5, 4) ((1) Instituto de Astrofisica de Canarias, (4) Universite Paris Diderot, C. Munoz-Tunon (1, France, France), J. A. L. Aguerri (1, J. Sanchez Almeida (1, M. Huertas-Company (3, Spain

arxiv:1104.4864 v1 · 2011-04-26 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GF4OL7RDGEMWVE46FNUNMV7GYE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:02:14.983844Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3178e5fe2331196a939e2b68d657e6c1324c09eda6b32e79a9481f3c5151fcfb

Aliases

arxiv: 1104.4864 · arxiv_version: 1104.4864v1 · doi: 10.48550/arxiv.1104.4864 · pith_short_12: GF4OL7RDGEMW · pith_short_16: GF4OL7RDGEMWVE46 · pith_short_8: GF4OL7RD

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/GF4OL7RDGEMWVE46FNUNMV7GYE \
  | 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: 3178e5fe2331196a939e2b68d657e6c1324c09eda6b32e79a9481f3c5151fcfb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "120ec281b853975f172317ee79de371679b6693a0cbaa221acef65ca9d9ed215",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-26T08:48:50Z",
    "title_canon_sha256": "2c0ad0339d1fcd4d996f6f8bd546213a8a24908ee79e1a8033a06969bc160dfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.4864",
    "kind": "arxiv",
    "version": 1
  }
}