Pith Number

pith:PCGX7UX2

pith:2026:PCGX7UX2QHJXDFTR5BIFMX6P77

not attested not anchored not stored refs pending

Solving a large oral examination timetabling problem using a multidimensional knapsack MILP formulation

Cyrille Briand (UT3, Jean-Pierre Belaud (LGC), LAAS-ROC)

arxiv:2605.18402 v1 · 2026-05-18 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PCGX7UX2QHJXDFTR5BIFMX6P77}

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	2026-05-20T00:05:58.970477Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

788d7fd2fa81d3719671e850565fcfffcec526b7615084c4982619668bdb71cc

Aliases

arxiv: 2605.18402 · arxiv_version: 2605.18402v1 · doi: 10.48550/arxiv.2605.18402 · pith_short_12: PCGX7UX2QHJX · pith_short_16: PCGX7UX2QHJXDFTR · pith_short_8: PCGX7UX2

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/PCGX7UX2QHJXDFTR5BIFMX6P77 \
  | 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: 788d7fd2fa81d3719671e850565fcfffcec526b7615084c4982619668bdb71cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25d52e7094797482137e8b2e857dab586b3bb700f3aa60f48c7ad9f69eadad68",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2026-05-18T13:44:54Z",
    "title_canon_sha256": "c849ba37f727aefe8d3a3bc9668932e9099e0a9cf9f0e89598e4ab8c3a7d6a0b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.18402",
    "kind": "arxiv",
    "version": 1
  }
}