Pith Number

pith:7KFSVER3

pith:2016:7KFSVER3CL6QNZ2EJOSSRHFFYE

not attested not anchored not stored refs pending

Regularization matrices determined by matrix nearness problems

Guangxin Huang, Lothar Reichel, Silvia Noschese

arxiv:1602.03318 v1 · 2016-02-10 · math.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{7KFSVER3CL6QNZ2EJOSSRHFFYE}

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	2026-05-18T01:21:00.281356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa8b2a923b12fd06e7444ba5289ca5c10a27fe9eabb52a21ab9d225c6e97f650

Aliases

arxiv: 1602.03318 · arxiv_version: 1602.03318v1 · doi: 10.48550/arxiv.1602.03318 · pith_short_12: 7KFSVER3CL6Q · pith_short_16: 7KFSVER3CL6QNZ2E · pith_short_8: 7KFSVER3

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/7KFSVER3CL6QNZ2EJOSSRHFFYE \
  | 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: fa8b2a923b12fd06e7444ba5289ca5c10a27fe9eabb52a21ab9d225c6e97f650

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18d033b4b623f59cc4d6083b05e2e1cc644f944c11df59b136afea878cc3759d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-02-10T10:30:16Z",
    "title_canon_sha256": "df39f16267b3c1b83b24e125fb2bcf8e59db879a1b2d36f6c20fb1aed0b8538e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.03318",
    "kind": "arxiv",
    "version": 1
  }
}