Pith Number

pith:H2QA3PSF

pith:2005:H2QA3PSFVM2MRPSGT2MTGCHALE

not attested not anchored not stored refs pending

Apology of Euclid

S. S. Kutateladze

arxiv:math/0507205 v1 · 2005-07-11 · math.GM · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H2QA3PSFVM2MRPSGT2MTGCHALE}

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	2026-05-18T04:21:00.895644Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ea00dbe45ab34c8be469e993308e0591e56ad259f143936a1965ffdd01c9ad2

Aliases

arxiv: math/0507205 · arxiv_version: math/0507205v1 · doi: 10.48550/arxiv.math/0507205 · pith_short_12: H2QA3PSFVM2M · pith_short_16: H2QA3PSFVM2MRPSG · pith_short_8: H2QA3PSF

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/H2QA3PSFVM2MRPSGT2MTGCHALE \
  | 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: 3ea00dbe45ab34c8be469e993308e0591e56ad259f143936a1965ffdd01c9ad2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9e70dfd8bb787b5e8443869e12ecc47d758c51000b7c9584bd4c63a8c2a1f1a",
    "cross_cats_sorted": [
      "math.HO"
    ],
    "license": "",
    "primary_cat": "math.GM",
    "submitted_at": "2005-07-11T06:35:59Z",
    "title_canon_sha256": "1cfef14ae91e1ae907a8e063eb563dfcdf3b5cedc3690c57125c15a36bbebdb0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0507205",
    "kind": "arxiv",
    "version": 1
  }
}