Pith Number

pith:PCESHY5P

pith:2020:PCESHY5PH65RZBDW7M2R4LV6BP

not attested not anchored not stored refs pending

Quaternion matrix regression for color face recognition

Jifei Miao, Kit Ian Kou

arxiv:2001.10677 v1 · 2020-01-20 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PCESHY5PH65RZBDW7M2R4LV6BP}

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	2026-07-05T00:37:11.345953Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

788923e3af3fbb1c8476fb351e2ebe0bd5e543e2d1156fe6816c629eb29e1ecf

Aliases

arxiv: 2001.10677 · arxiv_version: 2001.10677v1 · doi: 10.48550/arxiv.2001.10677 · pith_short_12: PCESHY5PH65R · pith_short_16: PCESHY5PH65RZBDW · pith_short_8: PCESHY5P

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/PCESHY5PH65RZBDW7M2R4LV6BP \
  | 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: 788923e3af3fbb1c8476fb351e2ebe0bd5e543e2d1156fe6816c629eb29e1ecf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a8de53c07790b3294c3001fa0912b92aa0cfbab4daedb6ca42a926f5384e9e2",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2020-01-20T13:30:28Z",
    "title_canon_sha256": "5dd5fbaabb1fe03d2b5b8cd197ff9edd0eec54db672258166cc585856bd918b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.10677",
    "kind": "arxiv",
    "version": 1
  }
}