Pith Number

pith:CY2QWQ62

pith:2017:CY2QWQ6263SP3YE6IQ7W4EXOS7

not attested not anchored not stored refs pending

The isomorphism class of $ c_{0} $ is not Borel

Ond\v{r}ej Kurka

arxiv:1711.03328 v1 · 2017-11-09 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CY2QWQ6263SP3YE6IQ7W4EXOS7}

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	2026-05-17T23:40:36.676328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16350b43daf6e4fde09e443f6e12ee97d86f4356c2c8cb1fbfaad3d822793bdf

Aliases

arxiv: 1711.03328 · arxiv_version: 1711.03328v1 · doi: 10.48550/arxiv.1711.03328 · pith_short_12: CY2QWQ6263SP · pith_short_16: CY2QWQ6263SP3YE6 · pith_short_8: CY2QWQ62

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/CY2QWQ6263SP3YE6IQ7W4EXOS7 \
  | 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: 16350b43daf6e4fde09e443f6e12ee97d86f4356c2c8cb1fbfaad3d822793bdf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d600b83d5f1929d47ed4c64a428de6642b4552ac7c38468f11c174e2fc191031",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2017-11-09T11:21:14Z",
    "title_canon_sha256": "bfd6470d8ba936d11444ab80046d66004ab06d97a81a53565c0d5cc99ca8d722"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.03328",
    "kind": "arxiv",
    "version": 1
  }
}