Pith Number

pith:2ZQD4OR4

pith:2013:2ZQD4OR4RA5TCYRUDXHNXLAJTW

not attested not anchored not stored refs pending

The CP-matrix completion problem

Anwa Zhou, Jinyan Fan

arxiv:1305.0632 v2 · 2013-05-03 · 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{2ZQD4OR4RA5TCYRUDXHNXLAJTW}

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	2026-05-18T03:06:42.903392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d6603e3a3c883b3162341dcedbac099d847c2bbaa8f9ed4f8c1d374f494ae650

Aliases

arxiv: 1305.0632 · arxiv_version: 1305.0632v2 · doi: 10.48550/arxiv.1305.0632 · pith_short_12: 2ZQD4OR4RA5T · pith_short_16: 2ZQD4OR4RA5TCYRU · pith_short_8: 2ZQD4OR4

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/2ZQD4OR4RA5TCYRUDXHNXLAJTW \
  | 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: d6603e3a3c883b3162341dcedbac099d847c2bbaa8f9ed4f8c1d374f494ae650

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2c72d8e27bac3d229e26b394a0bbfa225ac72ee3216939a83ddeaad45c0923c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-05-03T07:53:03Z",
    "title_canon_sha256": "114d2daebd22488ec21233db7959c197ff70ac32e717bdb0b56d79b28de43ec3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.0632",
    "kind": "arxiv",
    "version": 2
  }
}