Pith Number

pith:HPXHD7ES

pith:2019:HPXHD7ESXTS3ZY2IDUWWLFDQ4H

not attested not anchored not stored refs pending

Two modes of recognition: algebra, coalgebra, and languages

Marco Peressotti, Tomasz Brengos

arxiv:1906.05573 v1 · 2019-06-13 · cs.LO · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HPXHD7ESXTS3ZY2IDUWWLFDQ4H}

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	2026-05-17T23:43:24.895084Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bee71fc92bce5bce3481d2d659470e1fbf23ddb2dbe954f37dfcd3e882b52e1

Aliases

arxiv: 1906.05573 · arxiv_version: 1906.05573v1 · doi: 10.48550/arxiv.1906.05573 · pith_short_12: HPXHD7ESXTS3 · pith_short_16: HPXHD7ESXTS3ZY2I · pith_short_8: HPXHD7ES

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/HPXHD7ESXTS3ZY2IDUWWLFDQ4H \
  | 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: 3bee71fc92bce5bce3481d2d659470e1fbf23ddb2dbe954f37dfcd3e882b52e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1432b416afff02f616c5be969a9b33a36de4ca0e9a4bfbac63a6739a48b07440",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-06-13T09:44:54Z",
    "title_canon_sha256": "2e3ffebae02d36a0957e57792fe5739c31954a63cdd03e6a82e51d52d71cacb8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.05573",
    "kind": "arxiv",
    "version": 1
  }
}