Pith Number

pith:EQA4IE5Y

pith:2012:EQA4IE5YEP5RCEWZY4VVYBFCNF

not attested not anchored not stored refs pending

A note on column subset selection

Pierre Youssef

arxiv:1212.0976 v2 · 2012-12-05 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EQA4IE5YEP5RCEWZY4VVYBFCNF}

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	2026-05-18T01:27:05.894970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2401c413b823fb1112d9c72b5c04a26944f421a9e20055456f7e46a649806fd4

Aliases

arxiv: 1212.0976 · arxiv_version: 1212.0976v2 · doi: 10.48550/arxiv.1212.0976 · pith_short_12: EQA4IE5YEP5R · pith_short_16: EQA4IE5YEP5RCEWZ · pith_short_8: EQA4IE5Y

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/EQA4IE5YEP5RCEWZY4VVYBFCNF \
  | 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: 2401c413b823fb1112d9c72b5c04a26944f421a9e20055456f7e46a649806fd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd279c61ea56727b27da42678172e7f5d00eb99d1bc830ea0fe1611519448641",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2012-12-05T09:24:58Z",
    "title_canon_sha256": "b0e9e8d5566f58b9ade4c611b2e5ff2cc41e9ef19e0be0a5434e62d7846f1fc6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.0976",
    "kind": "arxiv",
    "version": 2
  }
}