Pith Number

pith:QDXK63J6

pith:2007:QDXK63J643RXSJ6JMAZJOM24NV

not attested not anchored not stored refs pending

Computing the complete CS decomposition

Brian D. Sutton

arxiv:0707.1838 v3 · 2007-07-12 · math.NA · cs.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{QDXK63J643RXSJ6JMAZJOM24NV}

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	2026-06-03T22:06:01.542366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80eeaf6d3ee6e37927c9603297335c6d50f8af354077838a031d39aaeb0acab0

Aliases

arxiv: 0707.1838 · arxiv_version: 0707.1838v3 · doi: 10.48550/arxiv.0707.1838 · pith_short_12: QDXK63J643RX · pith_short_16: QDXK63J643RXSJ6J · pith_short_8: QDXK63J6

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/QDXK63J643RXSJ6JMAZJOM24NV \
  | 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: 80eeaf6d3ee6e37927c9603297335c6d50f8af354077838a031d39aaeb0acab0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ffa32a16aa0d8ac522b85534ce73b87e8c98c9eacca961ef4b46d7334ab9505",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "",
    "primary_cat": "math.NA",
    "submitted_at": "2007-07-12T17:26:40Z",
    "title_canon_sha256": "b96e77cd7bbc1e2440d03b13c541c9262da8f2b50f7681998b4e5aa4a38231a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0707.1838",
    "kind": "arxiv",
    "version": 3
  }
}