Pith Number

pith:ULSP54UI

pith:2016:ULSP54UIGSCMCKNF6BGJI2UEYP

not attested not anchored not stored refs pending

Regularity Properties of Non-Negative Sparsity Sets

Matthew K. Tam

arxiv:1607.05924 v1 · 2016-07-20 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ULSP54UIGSCMCKNF6BGJI2UEYP}

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	2026-05-18T00:15:00.218877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2e4fef2883484c129a5f04c946a84c3f112104f9e5098682f394cb68a13a6ad

Aliases

arxiv: 1607.05924 · arxiv_version: 1607.05924v1 · doi: 10.48550/arxiv.1607.05924 · pith_short_12: ULSP54UIGSCM · pith_short_16: ULSP54UIGSCMCKNF · pith_short_8: ULSP54UI

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/ULSP54UIGSCMCKNF6BGJI2UEYP \
  | 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: a2e4fef2883484c129a5f04c946a84c3f112104f9e5098682f394cb68a13a6ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51187cee086efea0609ef16ec6633058653b147d3d7031dc629d24709286c273",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-07-20T11:45:43Z",
    "title_canon_sha256": "d9041751d86baa86d3bb7a54dc4913d5aa81623362ecfd400183bca25ae32957"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.05924",
    "kind": "arxiv",
    "version": 1
  }
}