Pith Number

pith:VYNDYU6I

pith:2009:VYNDYU6ICWLCBA6GI2ZV56RGQW

not attested not anchored not stored refs pending

HI in Local Group Dwarf Galaxies and Stripping by the Galactic Halo

Jana Grcevich, Mary E Putman

arxiv:0901.4975 v3 · 2009-01-30 · astro-ph.GA · 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{VYNDYU6ICWLCBA6GI2ZV56RGQW}

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	2026-05-18T01:13:10.142347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ae1a3c53c815962083c646b35efa268592ca751887b8f018a4e63944730beb9e

Aliases

arxiv: 0901.4975 · arxiv_version: 0901.4975v3 · doi: 10.48550/arxiv.0901.4975 · pith_short_12: VYNDYU6ICWLC · pith_short_16: VYNDYU6ICWLCBA6G · pith_short_8: VYNDYU6I

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/VYNDYU6ICWLCBA6GI2ZV56RGQW \
  | 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: ae1a3c53c815962083c646b35efa268592ca751887b8f018a4e63944730beb9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3da82f79d3e38d71a7b650c6cf8268fb9cb4bbde20120df9381e1097a8269c25",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-30T20:57:54Z",
    "title_canon_sha256": "bbd3bfaabb4203bb20dec6501302c070036304a5406a3a42372f350a5381b48c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4975",
    "kind": "arxiv",
    "version": 3
  }
}