Pith Number

pith:3BWDR2LC

pith:2026:3BWDR2LCR4VKPKW7ENDXQ5YEYG

not attested not anchored not stored refs pending

Approximation Algorithms for Matroidal Prerequisite Systems

Robert P. Streit, Vijay K. Garg

arxiv:2607.08151 v1 · 2026-07-09 · cs.DS · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3BWDR2LCR4VKPKW7ENDXQ5YEYG}

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	2026-07-10T01:19:28.010215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d86c38e9628f2aa7aadf2347787704c1b15a2107006cbdde79214ec3a10a2a1d

Aliases

arxiv: 2607.08151 · arxiv_version: 2607.08151v1 · doi: 10.48550/arxiv.2607.08151 · pith_short_12: 3BWDR2LCR4VK · pith_short_16: 3BWDR2LCR4VKPKW7 · pith_short_8: 3BWDR2LC

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/3BWDR2LCR4VKPKW7ENDXQ5YEYG \
  | 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: d86c38e9628f2aa7aadf2347787704c1b15a2107006cbdde79214ec3a10a2a1d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ddedd81c4dafef792dcf992d0e2638ca406fabc7149489246b2ec2fbe3e59873",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2026-07-09T06:42:57Z",
    "title_canon_sha256": "4c4ad05e421c90b58771a128b6f6f2004735460bb600d5b8b431a0d42ddd79c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.08151",
    "kind": "arxiv",
    "version": 1
  }
}