Pith Number

pith:CDGZUYW5

pith:2012:CDGZUYW5BB7XYIAO45YEHICJ66

not attested not anchored not stored refs pending

Free Lunch or No Free Lunch: That is not Just a Question?

Xin-She Yang

arxiv:1208.0527 v1 · 2012-08-02 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CDGZUYW5BB7XYIAO45YEHICJ66}

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	2026-05-18T03:49:33.899388Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10cd9a62dd087f7c200ee77043a049f7afbc14c463b88b3edd6f8ab4c98cae25

Aliases

arxiv: 1208.0527 · arxiv_version: 1208.0527v1 · doi: 10.48550/arxiv.1208.0527 · pith_short_12: CDGZUYW5BB7X · pith_short_16: CDGZUYW5BB7XYIAO · pith_short_8: CDGZUYW5

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/CDGZUYW5BB7XYIAO45YEHICJ66 \
  | 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: 10cd9a62dd087f7c200ee77043a049f7afbc14c463b88b3edd6f8ab4c98cae25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a68957e3ea810bf8d1206d232e48b22c9f75569e87519caa6b28e627d252283",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-08-02T16:03:58Z",
    "title_canon_sha256": "b7d7425f12ee0bd4f2a9a98daed006368e35ca087245985e6ee1f681258608a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.0527",
    "kind": "arxiv",
    "version": 1
  }
}