Pith Number

pith:QSAM5AHV

pith:2011:QSAM5AHVUVT2Y3PYTK5P3QRRHT

not attested not anchored not stored refs pending

Cauchy's continuum

Karin U. Katz, Mikhail G. Katz

arxiv:1108.4201 v2 · 2011-08-21 · 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{QSAM5AHVUVT2Y3PYTK5P3QRRHT}

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	2026-05-18T04:10:56.361086Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8480ce80f5a567ac6df89abafdc2313cd656239372c25d29d3fa5b7b12ab5cce

Aliases

arxiv: 1108.4201 · arxiv_version: 1108.4201v2 · doi: 10.48550/arxiv.1108.4201 · pith_short_12: QSAM5AHVUVT2 · pith_short_16: QSAM5AHVUVT2Y3PY · pith_short_8: QSAM5AHV

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/QSAM5AHVUVT2Y3PYTK5P3QRRHT \
  | 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: 8480ce80f5a567ac6df89abafdc2313cd656239372c25d29d3fa5b7b12ab5cce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "999f49a3d416dfdd508f99717254e2e236e6ecf61f0e267063a50579f0faf324",
    "cross_cats_sorted": [
      "math.CA",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2011-08-21T19:41:23Z",
    "title_canon_sha256": "d7a0f05c79c4e0fcfe100a00984992d02781b139c4abaf1e6472aa3586a4ad44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.4201",
    "kind": "arxiv",
    "version": 2
  }
}