Pith Number

pith:C2LTUPES

pith:2015:C2LTUPESNARIURG7LLJCWOQM7H

not attested not anchored not stored refs pending

Practical Algorithms for Finding Extremal Sets

David Gregg, Martin Marinov, Nicholas Nash

arxiv:1508.01753 v1 · 2015-08-07 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C2LTUPESNARIURG7LLJCWOQM7H}

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	2026-05-18T01:35:38.842081Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16973a3c9268228a44df5ad22b3a0cf9cc374ab86c114c625e40f08836e6d515

Aliases

arxiv: 1508.01753 · arxiv_version: 1508.01753v1 · doi: 10.48550/arxiv.1508.01753 · pith_short_12: C2LTUPESNARI · pith_short_16: C2LTUPESNARIURG7 · pith_short_8: C2LTUPES

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/C2LTUPESNARIURG7LLJCWOQM7H \
  | 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: 16973a3c9268228a44df5ad22b3a0cf9cc374ab86c114c625e40f08836e6d515

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b84aa740195b845d668f59d0ed4e9adddb16758ac578954cb9ca6e6e60ddfeba",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-08-07T16:33:54Z",
    "title_canon_sha256": "f6beb7e8354f47237670d1aa8c9fd4ff12cdc53cdcbed4b428160b936d3376c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.01753",
    "kind": "arxiv",
    "version": 1
  }
}