Pith Number

pith:VNHZ2JJO

pith:2015:VNHZ2JJOK2JHWPCDN6Y7M4JFHB

not attested not anchored not stored refs pending

A Collection of Challenging Optimization Problems in Science, Engineering and Economics

Crina Grosan, Dhagash Mehta

arxiv:1504.02366 v1 · 2015-04-09 · cs.NA · cs.MS · cs.NE · math.AG · math.NA · math.OC · physics.comp-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VNHZ2JJOK2JHWPCDN6Y7M4JFHB}

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	2026-05-18T00:57:50.772120Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab4f9d252e56927b3c436fb1f67125384d8e4bd01a5759a101da39a0575170aa

Aliases

arxiv: 1504.02366 · arxiv_version: 1504.02366v1 · doi: 10.48550/arxiv.1504.02366 · pith_short_12: VNHZ2JJOK2JH · pith_short_16: VNHZ2JJOK2JHWPCD · pith_short_8: VNHZ2JJO

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/VNHZ2JJOK2JHWPCDN6Y7M4JFHB \
  | 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: ab4f9d252e56927b3c436fb1f67125384d8e4bd01a5759a101da39a0575170aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4ef85e9b4094f38289b7d09679d85d8964e6958177106aa19a18c1efcc77839",
    "cross_cats_sorted": [
      "cs.MS",
      "cs.NE",
      "math.AG",
      "math.NA",
      "math.OC",
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2015-04-09T16:31:25Z",
    "title_canon_sha256": "b51c95785486d00cb01669fe5db3351d13b6907198ef10483be46a8f1402269f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02366",
    "kind": "arxiv",
    "version": 1
  }
}