Pith Number

pith:F6VGD6T7

pith:1999:F6VGD6T7JWE6OVOBW3JGCRGMDI

not attested not anchored not stored refs pending

Line Strengths and Line Strength Gradients in Bulges along the Hubble Sequence

J. Gorgas, P. Goudfrooij, P. Jablonka

arxiv:astro-ph/9910020 v1 · 1999-10-01 · 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{F6VGD6T7JWE6OVOBW3JGCRGMDI}

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	2026-07-04T16:11:39.902369Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2faa61fa7f4d89e755c1b6d26144cc1a0348c1b8e22a2be0ec9621515f426685

Aliases

arxiv: astro-ph/9910020 · arxiv_version: astro-ph/9910020v1 · doi: 10.48550/arxiv.astro-ph/9910020 · pith_short_12: F6VGD6T7JWE6 · pith_short_16: F6VGD6T7JWE6OVOB · pith_short_8: F6VGD6T7

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/F6VGD6T7JWE6OVOBW3JGCRGMDI \
  | 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: 2faa61fa7f4d89e755c1b6d26144cc1a0348c1b8e22a2be0ec9621515f426685

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b78a26e48ea7b08c563e9c559af375d8dd2ec1416ee22d5d553ab3c6ba84944",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-10-01T16:25:09Z",
    "title_canon_sha256": "403cc9ce4771e7b441205c34741ff6b3d2bb474e399d7fcfbedb8dd240d2d631"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9910020",
    "kind": "arxiv",
    "version": 1
  }
}