Pith Number

pith:FCCKTIO6

pith:2022:FCCKTIO64T2TNBU3D2M3YULSBU

not attested not anchored not stored refs pending

pycefr: Python Competency Level through Code Analysis

Chaiyong Ragkhitwetsagul, Gregorio Robles, Jesus M. Gonzalez-Barahona, Kenichi Matsumoto, Raula Gaikovina Kula, Tattiya Sakulniwat

arxiv:2203.15990 v1 · 2022-03-30 · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FCCKTIO64T2TNBU3D2M3YULSBU}

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	2026-07-05T04:10:06.003321Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2884a9a1dee4f536869b1e99bc51720d277f791d46e9cb78e9ca4b5825ad8a16

Aliases

arxiv: 2203.15990 · arxiv_version: 2203.15990v1 · doi: 10.48550/arxiv.2203.15990 · pith_short_12: FCCKTIO64T2T · pith_short_16: FCCKTIO64T2TNBU3 · pith_short_8: FCCKTIO6

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/FCCKTIO64T2TNBU3D2M3YULSBU \
  | 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: 2884a9a1dee4f536869b1e99bc51720d277f791d46e9cb78e9ca4b5825ad8a16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3d50393b01bd7909f76798ac7949b0258c261c39e53279748201ec128d1e08d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2022-03-30T01:54:26Z",
    "title_canon_sha256": "bc883cd68a16353e801fd7c86f4044caac42db960e56414f2c15433e83846683"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.15990",
    "kind": "arxiv",
    "version": 1
  }
}