Pith Number

pith:THPQX7IN

pith:2023:THPQX7IN7SSNP67MVBDCRFE6Y2

not attested not anchored not stored refs pending

Recognizing Handwritten Mathematical Expressions of Vertical Addition and Subtraction

Daniel Rosa, Everton Souza, Filipe R. Cordeiro, Luiz Rodrigues, Marcelo Marinho, Ruan Carvalho, Sergio Chevtchenko, Thales Vieira, Valmir Macario

arxiv:2308.05820 v1 · 2023-08-10 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{THPQX7IN7SSNP67MVBDCRFE6Y2}

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	2026-07-05T06:40:05.962542Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99df0bfd0dfca4d7fbeca84628949ec6bd2ac13d6008cc8d822f1b6ef2115841

Aliases

arxiv: 2308.05820 · arxiv_version: 2308.05820v1 · doi: 10.48550/arxiv.2308.05820 · pith_short_12: THPQX7IN7SSN · pith_short_16: THPQX7IN7SSNP67M · pith_short_8: THPQX7IN

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/THPQX7IN7SSNP67MVBDCRFE6Y2 \
  | 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: 99df0bfd0dfca4d7fbeca84628949ec6bd2ac13d6008cc8d822f1b6ef2115841

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fe4da83470201a5603adc1c809209117ee97302417d49af87f1f899445e5f30",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2023-08-10T18:39:35Z",
    "title_canon_sha256": "0853a4b74c24cefe34ade621d03fa7d9c2e5a308fee5f6f973e722dcd3cd97ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2308.05820",
    "kind": "arxiv",
    "version": 1
  }
}