Pith Number

pith:FSN32OES

pith:2012:FSN32OESE7QWAZ6FP4EQILUSAW

not attested not anchored not stored refs pending

The calculation of the distance to a nearby defective matrix

Alastair Spence, Melina A. Freitag

arxiv:1211.0535 v1 · 2012-11-02 · 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{FSN32OESE7QWAZ6FP4EQILUSAW}

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	2026-05-18T03:41:40.679383Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c9bbd389227e16067c57f09042e92059cc336a2a42435a87632173f6a28583e

Aliases

arxiv: 1211.0535 · arxiv_version: 1211.0535v1 · doi: 10.48550/arxiv.1211.0535 · pith_short_12: FSN32OESE7QW · pith_short_16: FSN32OESE7QWAZ6F · pith_short_8: FSN32OES

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/FSN32OESE7QWAZ6FP4EQILUSAW \
  | 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: 2c9bbd389227e16067c57f09042e92059cc336a2a42435a87632173f6a28583e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8e8e64ccba1d1ae6d62866cea0ab7ab92b8d63995a7d0ebf916307b240945f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-11-02T19:55:11Z",
    "title_canon_sha256": "212ddee17f2c7d81d0d3e9fe8db46a95d49ab21add52377579ac4c4c2dc2a7a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.0535",
    "kind": "arxiv",
    "version": 1
  }
}