Pith Number

pith:5SIZVS5F

pith:2020:5SIZVS5FIQ3T7IX5ZBXLNOGIR6

not attested not anchored not stored refs pending

An Improved Approximation Algorithm for the Matching Augmentation Problem

J.Cheriyan, J.Dippel, J.Zhu, R.Cummings

arxiv:2007.11559 v2 · 2020-07-22 · 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{5SIZVS5FIQ3T7IX5ZBXLNOGIR6}

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	2026-07-05T01:58:41.764352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec919acba544373fa2fdc86eb6b8c88f8f4c0728c9a9a0f52b8d1de21937353f

Aliases

arxiv: 2007.11559 · arxiv_version: 2007.11559v2 · doi: 10.48550/arxiv.2007.11559 · pith_short_12: 5SIZVS5FIQ3T · pith_short_16: 5SIZVS5FIQ3T7IX5 · pith_short_8: 5SIZVS5F

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/5SIZVS5FIQ3T7IX5ZBXLNOGIR6 \
  | 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: ec919acba544373fa2fdc86eb6b8c88f8f4c0728c9a9a0f52b8d1de21937353f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91f7126b278c23b271e05d31b605b42863cdf3ccfbfc787385f408b72ad7c4ba",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2020-07-22T17:28:02Z",
    "title_canon_sha256": "e9f528dac17d0994d0f20785587d9c7098c5c7a76fbec0d7cd919e058f42b814"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.11559",
    "kind": "arxiv",
    "version": 2
  }
}