Pith Number

pith:4BQDSMF7

pith:2018:4BQDSMF7V3DSQR7O6AUQX2LGUS

not attested not anchored not stored refs pending

On Sign Pattern Matrices that Allow or Require Algebraic Positivity

Diane Christine Pelejo, Jean Leonardo Abagat

arxiv:1806.09641 v2 · 2018-06-25 · math.CO · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BQDSMF7V3DSQR7O6AUQX2LGUS}

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	2026-05-17T23:56:15.090310Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0603930bfaec72847eef0290be966a4948f14a9eec1652e3e2b0af1c98a0be8

Aliases

arxiv: 1806.09641 · arxiv_version: 1806.09641v2 · doi: 10.48550/arxiv.1806.09641 · pith_short_12: 4BQDSMF7V3DS · pith_short_16: 4BQDSMF7V3DSQR7O · pith_short_8: 4BQDSMF7

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/4BQDSMF7V3DSQR7O6AUQX2LGUS \
  | 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: e0603930bfaec72847eef0290be966a4948f14a9eec1652e3e2b0af1c98a0be8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d99e5e7af331cd58667730399b39c5a466b3a54a84eb1b6fa3c6349a04b70343",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-06-25T18:00:18Z",
    "title_canon_sha256": "970a4667decc7ef4b8087dbcd7fdc83c55f36052da7e5c15d960a06d02d68112"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.09641",
    "kind": "arxiv",
    "version": 2
  }
}