Pith Number

pith:N37U5ON2

pith:2020:N37U5ON2N7VJYA5Z5MUQ3ZPH3J

not attested not anchored not stored refs pending

Machine Number Sense: A Dataset of Visual Arithmetic Problems for Abstract and Relational Reasoning

Chi Zhang, Song-Chun Zhu, Wenhe Zhang, Yixin Zhu

arxiv:2004.12193 v1 · 2020-04-25 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N37U5ON2N7VJYA5Z5MUQ3ZPH3J}

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	2026-07-05T00:58:13.334749Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6eff4eb9ba6fea9c03b9eb290de5e7da4a857da10baf59295c9b9190bcd895ad

Aliases

arxiv: 2004.12193 · arxiv_version: 2004.12193v1 · doi: 10.48550/arxiv.2004.12193 · pith_short_12: N37U5ON2N7VJ · pith_short_16: N37U5ON2N7VJYA5Z · pith_short_8: N37U5ON2

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/N37U5ON2N7VJYA5Z5MUQ3ZPH3J \
  | 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: 6eff4eb9ba6fea9c03b9eb290de5e7da4a857da10baf59295c9b9190bcd895ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6003e3b0f5f2eac7c49b78825a3cd62df78abe15f994f3d37561fc598043af8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2020-04-25T17:14:58Z",
    "title_canon_sha256": "eed2caffaae70cc27f0a894138e6cf2814bb242cf1c44c2b7c96f11773e6d858"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.12193",
    "kind": "arxiv",
    "version": 1
  }
}