Pith Number

pith:BBXKIVW2

pith:2015:BBXKIVW2MUSQ2HZZ45LU2HPCG7

not attested not anchored not stored refs pending

i-MARK: A New Subtraction Division Game

Eric Sopena (LaBRI)

arxiv:1509.04199 v2 · 2015-09-14 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BBXKIVW2MUSQ2HZZ45LU2HPCG7}

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	2026-05-18T01:27:31.220495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

086ea456da65250d1f39e7574d1de237cbe1da87a9d7adef25ea6a97ea8d8375

Aliases

arxiv: 1509.04199 · arxiv_version: 1509.04199v2 · doi: 10.48550/arxiv.1509.04199 · pith_short_12: BBXKIVW2MUSQ · pith_short_16: BBXKIVW2MUSQ2HZZ · pith_short_8: BBXKIVW2

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/BBXKIVW2MUSQ2HZZ45LU2HPCG7 \
  | 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: 086ea456da65250d1f39e7574d1de237cbe1da87a9d7adef25ea6a97ea8d8375

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "261dab5fa71563b7e692fbf2ca1424ea6f2a94f8050451ff0268a35f36a4fc7b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-09-14T16:57:57Z",
    "title_canon_sha256": "0e7b6abb62c829266b8bdeb8603003130305ed67504d19c8202b0174e3b2b803"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04199",
    "kind": "arxiv",
    "version": 2
  }
}