Pith Number

pith:U4FDBZKE

pith:2018:U4FDBZKEFSUF5AESQ3QODLAAMX

not attested not anchored not stored refs pending

The equivalence between two classic algorithms for the assignment problem

Carlos A. Alfaro, Carlos E. Valencia, Marcos C. Vargas, Sergio L. Perez

arxiv:1810.03562 v1 · 2018-10-08 · math.OC · 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{U4FDBZKEFSUF5AESQ3QODLAAMX}

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	2026-05-18T00:03:50.911016Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a70a30e5442ca85e809286e0e1ac0065c7b679bb8ac1a0ee42196189473032cb

Aliases

arxiv: 1810.03562 · arxiv_version: 1810.03562v1 · doi: 10.48550/arxiv.1810.03562 · pith_short_12: U4FDBZKEFSUF · pith_short_16: U4FDBZKEFSUF5AES · pith_short_8: U4FDBZKE

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/U4FDBZKEFSUF5AESQ3QODLAAMX \
  | 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: a70a30e5442ca85e809286e0e1ac0065c7b679bb8ac1a0ee42196189473032cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e01c89f1583f38f457fc1b5bf4eeee0942e588e348a1998d96241ceae978602b",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-10-08T16:23:15Z",
    "title_canon_sha256": "242f3a96c0f09e919fe0b25779707b8db33bb2754d2c69b23ba02128ec4ddf0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.03562",
    "kind": "arxiv",
    "version": 1
  }
}