Pith Number

pith:E7UT7CEO

pith:2021:E7UT7CEOLIHX3EPY3N6IFO5VQX

not attested not anchored not stored refs pending

Classification of Planetary Nebulae through Deep Transfer Learning

Ahmad H. Fauzi, Albert A. Zijlstra, Dayang N.F. Awang Iskandar, Gary A. Fuller, Iain McDonald, Johari Abdullah, Rosni Abdullah

arxiv:2101.12628 v1 · 2021-01-29 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E7UT7CEOLIHX3EPY3N6IFO5VQX}

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	2026-07-05T02:10:46.057425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27e93f888e5a0f7d91f8db7c82bbb585cf1483fb637157d619f7b0190785af89

Aliases

arxiv: 2101.12628 · arxiv_version: 2101.12628v1 · doi: 10.48550/arxiv.2101.12628 · pith_short_12: E7UT7CEOLIHX · pith_short_16: E7UT7CEOLIHX3EPY · pith_short_8: E7UT7CEO

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/E7UT7CEOLIHX3EPY3N6IFO5VQX \
  | 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: 27e93f888e5a0f7d91f8db7c82bbb585cf1483fb637157d619f7b0190785af89

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11b5ffb754bd7bf10781f9df283f6cf70a7c752415161dd6fdfe77a47acd741e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-01-29T15:06:32Z",
    "title_canon_sha256": "fa25a783a15a31ef3c9745462e34bc1628c97bb4e2e112f26925d6554d8f3551"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.12628",
    "kind": "arxiv",
    "version": 1
  }
}