Pith Number

pith:OETQLSAA

pith:2017:OETQLSAAEB3GCAWY753FGC5PRU

not attested not anchored not stored refs pending

The quadratic M-convexity testing problem

Yuni Iwamasa

arxiv:1704.02836 v3 · 2017-04-10 · 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{OETQLSAAEB3GCAWY753FGC5PRU}

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	2026-05-18T00:23:14.282641Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

712705c80020766102d8ff76530baf8d27582b97c670f7c2eee3c8812d63d472

Aliases

arxiv: 1704.02836 · arxiv_version: 1704.02836v3 · doi: 10.48550/arxiv.1704.02836 · pith_short_12: OETQLSAAEB3G · pith_short_16: OETQLSAAEB3GCAWY · pith_short_8: OETQLSAA

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/OETQLSAAEB3GCAWY753FGC5PRU \
  | 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: 712705c80020766102d8ff76530baf8d27582b97c670f7c2eee3c8812d63d472

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a68e715bd757ae33c1c218299dcd6259916c7dbb0226112e54c5883022209bcd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-04-10T12:59:40Z",
    "title_canon_sha256": "bc74759b72dcd93091e9ac8810866ee17ed1260a9f2e6f03f55d033e1ef26714"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.02836",
    "kind": "arxiv",
    "version": 3
  }
}