Pith Number

pith:W6PR5C3F

pith:2018:W6PR5C3FEBDQZGOLFYMIOE5U4H

not attested not anchored not stored refs pending

Invariant Representation of Mathematical Expressions

Reza Shahbazi

arxiv:1805.12495 v2 · 2018-05-29 · 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{W6PR5C3FEBDQZGOLFYMIOE5U4H}

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	2026-07-05T02:14:39.710869Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b79f1e8b6520470c99cb2e188713b4e1d51de636edeee1c4e637f9091d2907f6

Aliases

arxiv: 1805.12495 · arxiv_version: 1805.12495v2 · doi: 10.48550/arxiv.1805.12495 · pith_short_12: W6PR5C3FEBDQ · pith_short_16: W6PR5C3FEBDQZGOL · pith_short_8: W6PR5C3F

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/W6PR5C3FEBDQZGOLFYMIOE5U4H \
  | 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: b79f1e8b6520470c99cb2e188713b4e1d51de636edeee1c4e637f9091d2907f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c91eb6a49b307de4beccce4d37d64383f3e57e97f76f0ac65928424a5b1423c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2018-05-29T22:48:59Z",
    "title_canon_sha256": "fed6d3c7df08a8eeb0798063e5c7c62e716c8253d9155ff941744adc7307bea6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.12495",
    "kind": "arxiv",
    "version": 2
  }
}