Pith Number

pith:IGIS6A4F

pith:2021:IGIS6A4FNW4CDJXHN6SDYR7ZF3

not attested not anchored not stored refs pending

Spirals in galaxies

J. A. Sellwood (Steward Observatory), Karen L. Masters (Haverford College)

arxiv:2110.05615 v4 · 2021-10-11 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IGIS6A4FNW4CDJXHN6SDYR7ZF3}

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.

Cited by

2 papers in Pith

Effects of Resolution and Local Stability on Galactic Disks: I. Multiple Spiral Mode Formation via Swing Amplification

Nexae in caverna: the secular evolution of disks via collectively excited, transient spiral structure

Receipt and verification

First computed	2026-07-05T05:01:16.149362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41912f03856db821a6e76fa43c47f92ef8a0c80ad91cc8151a40d84a50d137c8

Aliases

arxiv: 2110.05615 · arxiv_version: 2110.05615v4 · doi: 10.48550/arxiv.2110.05615 · pith_short_12: IGIS6A4FNW4C · pith_short_16: IGIS6A4FNW4CDJXH · pith_short_8: IGIS6A4F

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/IGIS6A4FNW4CDJXHN6SDYR7ZF3 \
  | 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: 41912f03856db821a6e76fa43c47f92ef8a0c80ad91cc8151a40d84a50d137c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2bde6109516024df9caca5ccdd2060236deb196b96f9c7ce787cf4e10125470",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-10-11T21:14:59Z",
    "title_canon_sha256": "0d5171917908e8a327e736406932c45dae244309adb0256e3687a18620471bf0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.05615",
    "kind": "arxiv",
    "version": 4
  }
}