Pith Number

pith:NY52TWOT

pith:2009:NY52TWOT2X5HSPCCUU7W3U7MPP

not attested not anchored not stored refs pending

Spectral Methods for Parameterized Matrix Equations

David F. Gleich, Gianluca Iaccarino, Paul G. Constantine

arxiv:0904.2040 v1 · 2009-04-14 · 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{NY52TWOT2X5HSPCCUU7W3U7MPP}

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	2026-05-18T03:25:26.065346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e3ba9d9d3d5fa793c42a53f6dd3ec7bebe5074ee5c7e15d138863bc3d408de2

Aliases

arxiv: 0904.2040 · arxiv_version: 0904.2040v1 · doi: 10.48550/arxiv.0904.2040 · pith_short_12: NY52TWOT2X5H · pith_short_16: NY52TWOT2X5HSPCC · pith_short_8: NY52TWOT

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/NY52TWOT2X5HSPCCUU7W3U7MPP \
  | 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: 6e3ba9d9d3d5fa793c42a53f6dd3ec7bebe5074ee5c7e15d138863bc3d408de2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf8a9c08a87192134ae6b72594117ef1cf6ed1c6926ee23271ac5c94b6c8e319",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-04-14T02:19:06Z",
    "title_canon_sha256": "027d89347968d007648197c14a79a10bf7e2e338f95524de97c786b3dc5c6983"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2040",
    "kind": "arxiv",
    "version": 1
  }
}