Pith Number

pith:245TQ2Q4

pith:2026:245TQ2Q4MBLKOXCNQH5CDENAFH

not attested not anchored not stored refs pending

Waterproof Editor: an educational environment for proof assistants and programming languages

Dick Arends, Jim Portegies, Pieter Wils, Pim Otte, Raul S\'anchez Flores

arxiv:2606.01875 v1 · 2026-06-01 · math.HO · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{245TQ2Q4MBLKOXCNQH5CDENAFH}

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	2026-06-02T02:04:59.296479Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d73b386a1c6056a75c4d81fa2191a029eb984aa47d59f56192f86da7c12522ca

Aliases

arxiv: 2606.01875 · arxiv_version: 2606.01875v1 · doi: 10.48550/arxiv.2606.01875 · pith_short_12: 245TQ2Q4MBLK · pith_short_16: 245TQ2Q4MBLKOXCN · pith_short_8: 245TQ2Q4

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/245TQ2Q4MBLKOXCNQH5CDENAFH \
  | 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: d73b386a1c6056a75c4d81fa2191a029eb984aa47d59f56192f86da7c12522ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eba5ba5d04cd3778dd3f241161c2f25ac3f81f4eb0f5804ca1395d4de96715d8",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2026-06-01T08:20:21Z",
    "title_canon_sha256": "f47081aec4801aa894d8c26849838fb189591ccad5b5454800768523af8c2eb8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.01875",
    "kind": "arxiv",
    "version": 1
  }
}