Pith Number

pith:4GQ2WYK7

pith:2015:4GQ2WYK7PH7IIVQL7ZVGV6DAQA

not attested not anchored not stored refs pending

Contamination Estimation via Convex Relaxations

Matthew L. Malloy, Paul Barford, Scott Alfeld

arxiv:1506.04257 v1 · 2015-06-13 · cs.IT · cs.LG · math.IT · 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{4GQ2WYK7PH7IIVQL7ZVGV6DAQA}

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	2026-05-18T01:49:55.116117Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1a1ab615f79fe84560bfe6a6af860800ad0922232b19dcefc58505e3a822d08

Aliases

arxiv: 1506.04257 · arxiv_version: 1506.04257v1 · doi: 10.48550/arxiv.1506.04257 · pith_short_12: 4GQ2WYK7PH7I · pith_short_16: 4GQ2WYK7PH7IIVQL · pith_short_8: 4GQ2WYK7

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/4GQ2WYK7PH7IIVQL7ZVGV6DAQA \
  | 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: e1a1ab615f79fe84560bfe6a6af860800ad0922232b19dcefc58505e3a822d08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba22329ddd396a4d7e5b8c6096b533125aa6107ea6bfdf8d49c0e35a3a684ed8",
    "cross_cats_sorted": [
      "cs.LG",
      "math.IT",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-06-13T11:51:52Z",
    "title_canon_sha256": "023265be0fbd20a5b3e8bf54bd74850787f692c1a02414695e3714882c41b22a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.04257",
    "kind": "arxiv",
    "version": 1
  }
}