Pith Number

pith:BY75C7AM

pith:2015:BY75C7AMWGUAH65235HMM2FUJ5

not attested not anchored not stored refs pending

How Bad Are Vandermonde Matrices?

Victor Y. Pan

arxiv:1504.02118 v3 · 2015-04-08 · 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{BY75C7AMWGUAH65235HMM2FUJ5}

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	2026-05-18T01:37:03.677521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e3fd17c0cb1a803fbbadf4ec668b44f720b9c7808484bd75b587546333918d4

Aliases

arxiv: 1504.02118 · arxiv_version: 1504.02118v3 · doi: 10.48550/arxiv.1504.02118 · pith_short_12: BY75C7AMWGUA · pith_short_16: BY75C7AMWGUAH652 · pith_short_8: BY75C7AM

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/BY75C7AMWGUAH65235HMM2FUJ5 \
  | 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: 0e3fd17c0cb1a803fbbadf4ec668b44f720b9c7808484bd75b587546333918d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "638d65a357c84f182a107634e0b0e2c23a915ea11484262b09987029801dc311",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-04-08T20:29:02Z",
    "title_canon_sha256": "662c8283cdc176162d9be9038e57b5407f7d89caa4fbadf50841937e3262df35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02118",
    "kind": "arxiv",
    "version": 3
  }
}