Pith Number

pith:5Q3PL5R2

pith:2009:5Q3PL5R2OVYF6K5NRIU3HP244C

not attested not anchored not stored refs pending

On Element SDD Approximability

Gil Shklarski, Haim Avron, Sivan Toledo

arxiv:0911.0547 v1 · 2009-11-03 · cs.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5Q3PL5R2OVYF6K5NRIU3HP244C}

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	2026-06-03T23:06:30.344525Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec36f5f63a75705f2bad8a29b3bf5ce0a343688010905223e5bd5e2d53f11111

Aliases

arxiv: 0911.0547 · arxiv_version: 0911.0547v1 · doi: 10.48550/arxiv.0911.0547 · pith_short_12: 5Q3PL5R2OVYF · pith_short_16: 5Q3PL5R2OVYF6K5N · pith_short_8: 5Q3PL5R2

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/5Q3PL5R2OVYF6K5NRIU3HP244C \
  | 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: ec36f5f63a75705f2bad8a29b3bf5ce0a343688010905223e5bd5e2d53f11111

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "16fa72fe006f3b5c3799561c56ce9887d5ee7ef00e31f6f6751087c6b344a916",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2009-11-03T10:55:16Z",
    "title_canon_sha256": "726f10e3516ed3449276501a93fd61308349f03e27c1d24610bc7eadd2e2f844"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.0547",
    "kind": "arxiv",
    "version": 1
  }
}