Pith Number

pith:WJEX3YOR

pith:2014:WJEX3YOR2VIVGX4JYS3J4WELL2

not attested not anchored not stored refs pending

Almost Separable Matrices

Karen Gunderson, Leonardo Baldassini, Matthew Aldridge

arxiv:1410.1826 v1 · 2014-10-07 · math.CO · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WJEX3YOR2VIVGX4JYS3J4WELL2}

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	2026-05-18T00:29:49.436496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2497de1d1d551535f89c4b69e588b5eaeff91c5d146bcbeb57d4dd0ea302a67

Aliases

arxiv: 1410.1826 · arxiv_version: 1410.1826v1 · doi: 10.48550/arxiv.1410.1826 · pith_short_12: WJEX3YOR2VIV · pith_short_16: WJEX3YOR2VIVGX4J · pith_short_8: WJEX3YOR

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/WJEX3YOR2VIVGX4JYS3J4WELL2 \
  | 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: b2497de1d1d551535f89c4b69e588b5eaeff91c5d146bcbeb57d4dd0ea302a67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dad3457fa864aadd232407d5fe220aecb5eb6767fc96141cbf4d7970009d8d38",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-10-07T17:59:46Z",
    "title_canon_sha256": "c12276a63636763f416ddd760c2a984b4cf8175cec36b2e6dc66211d13609a95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.1826",
    "kind": "arxiv",
    "version": 1
  }
}