Pith Number

pith:57JEKVT5

pith:2008:57JEKVT5GM7EICK35YK2XUY6WJ

not attested not anchored not stored refs pending

A moment problem for pseudo-positive definite functionals

Hermann Render, Ognyan Kounchev

arxiv:0802.0023 v1 · 2008-01-31 · math.FA · cs.NA · 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{57JEKVT5GM7EICK35YK2XUY6WJ}

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	2026-06-03T22:06:04.286985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efd245567d333e44095bee15abd31eb255c26dcf94b1169d818148f3509936b6

Aliases

arxiv: 0802.0023 · arxiv_version: 0802.0023v1 · doi: 10.48550/arxiv.0802.0023 · pith_short_12: 57JEKVT5GM7E · pith_short_16: 57JEKVT5GM7EICK3 · pith_short_8: 57JEKVT5

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/57JEKVT5GM7EICK35YK2XUY6WJ \
  | 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: efd245567d333e44095bee15abd31eb255c26dcf94b1169d818148f3509936b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5d6d0a6b5d94ce839bf8b626564f57a8cc628e0addadd5c2ec34d945a786b5f",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "",
    "primary_cat": "math.FA",
    "submitted_at": "2008-01-31T22:22:19Z",
    "title_canon_sha256": "4771fe06709db4ba77bf946f654941806a258896266661b2e30c9b6bb5ade8e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.0023",
    "kind": "arxiv",
    "version": 1
  }
}