Pith Number

pith:4M2NYK2T

pith:2016:4M2NYK2TSH4K2IUPSW6UISNHS3

not attested not anchored not stored refs pending

New properties for certain positive semidefinite matrices

Minghua Lin

arxiv:1609.08231 v1 · 2016-09-27 · math.FA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4M2NYK2TSH4K2IUPSW6UISNHS3}

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	2026-05-18T01:03:46.328334Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e334dc2b5391f8ad228f95bd4449a796df9485a9d6993cd467bd7506c70a0afc

Aliases

arxiv: 1609.08231 · arxiv_version: 1609.08231v1 · doi: 10.48550/arxiv.1609.08231 · pith_short_12: 4M2NYK2TSH4K · pith_short_16: 4M2NYK2TSH4K2IUP · pith_short_8: 4M2NYK2T

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/4M2NYK2TSH4K2IUPSW6UISNHS3 \
  | 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: e334dc2b5391f8ad228f95bd4449a796df9485a9d6993cd467bd7506c70a0afc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d121d1d07bfd84596f2848b9e85bfb280e9f0930e84844af68899b4ecbaff9bc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2016-09-27T00:41:18Z",
    "title_canon_sha256": "34e6718c6e5cc195e169d0b9d03d7aae5f987c87a0c09cd884689d1a3b57553b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.08231",
    "kind": "arxiv",
    "version": 1
  }
}