Pith Number

pith:DW2V7SL7

pith:2019:DW2V7SL7WEEBTX36MVWWHUGQAR

not attested not anchored not stored refs pending

On a perfect matching in a random bipartite digraph with average out-degree below two

Boris Pittel, Ed Overman, Michal Karo\'nski

arxiv:1903.05764 v1 · 2019-03-13 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DW2V7SL7WEEBTX36MVWWHUGQAR}

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	2026-05-17T23:51:16.302580Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1db55fc97fb10819df7e656d63d0d0047c0b24493208309bc7cca4493526f7b4

Aliases

arxiv: 1903.05764 · arxiv_version: 1903.05764v1 · doi: 10.48550/arxiv.1903.05764 · pith_short_12: DW2V7SL7WEEB · pith_short_16: DW2V7SL7WEEBTX36 · pith_short_8: DW2V7SL7

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/DW2V7SL7WEEBTX36MVWWHUGQAR \
  | 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: 1db55fc97fb10819df7e656d63d0d0047c0b24493208309bc7cca4493526f7b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4b8dbbedcee7e9e5c3f3249cbd9f70e012a31604f23f631ec823f868d334b55",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-03-13T23:54:31Z",
    "title_canon_sha256": "d4cac26e312fd7f0f651af9d00d39c0d6ddea060b2a115b0a90b26b474e50a53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.05764",
    "kind": "arxiv",
    "version": 1
  }
}