Pith Number

pith:DY47GHX2

pith:2011:DY47GHX22TCGNL3KOIVITTHYKU

not attested not anchored not stored refs pending

How Different are Normal and Barred Spirals?

Sidney van den Bergh

arxiv:1104.0698 v1 · 2011-04-04 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DY47GHX22TCGNL3KOIVITTHYKU}

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	2026-05-18T02:02:38.157918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e39f31efad4c466af6a722a89ccf855123fa04e256048a2300522919eda57bd

Aliases

arxiv: 1104.0698 · arxiv_version: 1104.0698v1 · doi: 10.48550/arxiv.1104.0698 · pith_short_12: DY47GHX22TCG · pith_short_16: DY47GHX22TCGNL3K · pith_short_8: DY47GHX2

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/DY47GHX22TCGNL3KOIVITTHYKU \
  | 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: 1e39f31efad4c466af6a722a89ccf855123fa04e256048a2300522919eda57bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04bd00a3c2bd9653b4a0b68f291b7eb89f48d928a2c141f41d08a1512a3e9ef9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-04T22:06:45Z",
    "title_canon_sha256": "f41ac67639d251e26265cfd4127743a8caeb4cbabac887d1e35af0503bba6ec4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.0698",
    "kind": "arxiv",
    "version": 1
  }
}