Pith Number

pith:EDTTPJD7

pith:2018:EDTTPJD7F5SQZCV7JQ7WVU6PWF

not attested not anchored not stored refs pending

Polynomial (chaos) approximation of maximum eigenvalue functions: efficiency and limitations

Luca Fenzi, Wim Michiels

arxiv:1804.03881 v2 · 2018-04-11 · math.NA · cs.NA · math.DS · math.OC · math.PR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EDTTPJD7F5SQZCV7JQ7WVU6PWF}

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	2026-07-05T01:48:04.536639Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20e737a47f2f650c8abf4c3f6ad3cfb15269ef27bf572e0d2edae7406b62ccd3

Aliases

arxiv: 1804.03881 · arxiv_version: 1804.03881v2 · doi: 10.48550/arxiv.1804.03881 · pith_short_12: EDTTPJD7F5SQ · pith_short_16: EDTTPJD7F5SQZCV7 · pith_short_8: EDTTPJD7

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/EDTTPJD7F5SQZCV7JQ7WVU6PWF \
  | 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: 20e737a47f2f650c8abf4c3f6ad3cfb15269ef27bf572e0d2edae7406b62ccd3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b62a02f5f2f1ca802f08e54f13e197b8c05a6a8cd15d0c60f5a25b16532378d",
    "cross_cats_sorted": [
      "cs.NA",
      "math.DS",
      "math.OC",
      "math.PR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-04-11T09:13:35Z",
    "title_canon_sha256": "c2a81b04302e9d3ec4a55ad7119e9ebd0746f86dbfefdc014b647a3cf7904cd4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.03881",
    "kind": "arxiv",
    "version": 2
  }
}