Pith Number

pith:IIZWTGZJ

pith:2018:IIZWTGZJL65GGASWF3B66FW64J

not attested not anchored not stored refs pending

The Matching Augmentation Problem: A $\frac74$-Approximation Algorithm

Arindam Khan, Fabrizio Grandoni, Jack Dippel, Joe Cheriyan, Vishnu V. Narayan

arxiv:1810.07816 v2 · 2018-10-17 · 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{IIZWTGZJL65GGASWF3B66FW64J}

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	2026-05-17T23:47:59.361622Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4233699b295fba6302562ec3ef16dee27872ea91d20f1355578d13167afbba1a

Aliases

arxiv: 1810.07816 · arxiv_version: 1810.07816v2 · doi: 10.48550/arxiv.1810.07816 · pith_short_12: IIZWTGZJL65G · pith_short_16: IIZWTGZJL65GGASW · pith_short_8: IIZWTGZJ

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/IIZWTGZJL65GGASWF3B66FW64J \
  | 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: 4233699b295fba6302562ec3ef16dee27872ea91d20f1355578d13167afbba1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e25a119a9397efe706737274b634cff4765b27e0648a404cf9cd308ed2675ef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-10-17T21:55:38Z",
    "title_canon_sha256": "2a14538274f697121b662fb4c49e2d7f8856c65d20ff4238e4850ad4991b2667"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.07816",
    "kind": "arxiv",
    "version": 2
  }
}