Pith Number

pith:KWLWKQ3I

pith:2018:KWLWKQ3IEYBPK5M4RJNRWHX6U7

not attested not anchored not stored refs pending

What makes a theory of infinitesimals useful? A view by Klein and Fraenkel

Karin U. Katz, Mikhail G. Katz, Thomas Mormann, Vladimir Kanovei

arxiv:1802.01972 v1 · 2018-02-01 · math.HO · math.CA · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KWLWKQ3IEYBPK5M4RJNRWHX6U7}

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	2026-05-18T00:24:20.804802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55976543682602f5759c8a5b1b1efea7d0200509e69b221d2f75454f1a2844e4

Aliases

arxiv: 1802.01972 · arxiv_version: 1802.01972v1 · doi: 10.48550/arxiv.1802.01972 · pith_short_12: KWLWKQ3IEYBP · pith_short_16: KWLWKQ3IEYBPK5M4 · pith_short_8: KWLWKQ3I

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/KWLWKQ3IEYBPK5M4RJNRWHX6U7 \
  | 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: 55976543682602f5759c8a5b1b1efea7d0200509e69b221d2f75454f1a2844e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c69f96cf51719e5413d86798601679cba1ce079167812a0e7a36bc9e9ac8603f",
    "cross_cats_sorted": [
      "math.CA",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2018-02-01T15:37:18Z",
    "title_canon_sha256": "5c12c883bcfeade2dc0f70cd94bfc553368c1499aae3c435eb849f1070c0979b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.01972",
    "kind": "arxiv",
    "version": 1
  }
}