Pith Number

pith:2K46YQP4

pith:2013:2K46YQP4MQ7OZYEPEWJQU5HRD4

not attested not anchored not stored refs pending

On the maximum angle between copositive matrices

Felix Goldberg, Naomi Shaked-Monderer

arxiv:1307.7519 v2 · 2013-07-29 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2K46YQP4MQ7OZYEPEWJQU5HRD4}

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	2026-05-18T02:51:42.216948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2b9ec41fc643eece08f25930a74f11f3fbc4b133523c09c48d44d091e35b7a1

Aliases

arxiv: 1307.7519 · arxiv_version: 1307.7519v2 · doi: 10.48550/arxiv.1307.7519 · pith_short_12: 2K46YQP4MQ7O · pith_short_16: 2K46YQP4MQ7OZYEP · pith_short_8: 2K46YQP4

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/2K46YQP4MQ7OZYEPEWJQU5HRD4 \
  | 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: d2b9ec41fc643eece08f25930a74f11f3fbc4b133523c09c48d44d091e35b7a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b50aec3ea12b6bce0ffcfec8f8da93c10eaec14282ee400254544f06045ab1af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-07-29T09:53:42Z",
    "title_canon_sha256": "d2e03b65d7dbdf6bee5158b09d2e4e44f101a317ada13aa6c3c41941749db8a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.7519",
    "kind": "arxiv",
    "version": 2
  }
}