Pith Number

pith:2S4KDOR2

pith:2022:2S4KDOR2SGBJ3NCCWP3XN6FBGP

not attested not anchored not stored refs pending

Classifying Galaxy Morphologies with Few-Shot Learning

Nan Li, Yanli Chen, Zhiqiang Zou, Zhirui Zhang

arxiv:2202.08172 v2 · 2022-02-16 · astro-ph.GA · 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{2S4KDOR2SGBJ3NCCWP3XN6FBGP}

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	2026-07-05T04:19:54.318883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4b8a1ba3a91829db442b3f776f8a133c16fb756b1e8dd570ef23593ee2366bd

Aliases

arxiv: 2202.08172 · arxiv_version: 2202.08172v2 · doi: 10.48550/arxiv.2202.08172 · pith_short_12: 2S4KDOR2SGBJ · pith_short_16: 2S4KDOR2SGBJ3NCC · pith_short_8: 2S4KDOR2

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/2S4KDOR2SGBJ3NCCWP3XN6FBGP \
  | 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: d4b8a1ba3a91829db442b3f776f8a133c16fb756b1e8dd570ef23593ee2366bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "569fac1b903b902fd7cc27d0f30b8828f3c1017021682a8f949dab0747e1cf11",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2022-02-16T16:23:30Z",
    "title_canon_sha256": "144070f4decae9fd14e6d1fca2f193f323febc648e29d8b86a4b5760aefb45fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2202.08172",
    "kind": "arxiv",
    "version": 2
  }
}