Pith Number

pith:JU4DGIYS

pith:2018:JU4DGIYSHNKKWSCJGQMHBB6344

not attested not anchored not stored refs pending

Characterization of a metrizable space $X$ such that $F_4(X)$ is Fr\'echet-Urysohn

Kohzo Yamada

arxiv:1807.02260 v1 · 2018-07-06 · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JU4DGIYSHNKKWSCJGQMHBB6344}

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	2026-05-18T00:11:22.642049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d383323123b54ab484934187087dbe72c2c75e480d4b695f5c67c8fa950a139

Aliases

arxiv: 1807.02260 · arxiv_version: 1807.02260v1 · doi: 10.48550/arxiv.1807.02260 · pith_short_12: JU4DGIYSHNKK · pith_short_16: JU4DGIYSHNKKWSCJ · pith_short_8: JU4DGIYS

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/JU4DGIYSHNKKWSCJGQMHBB6344 \
  | 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: 4d383323123b54ab484934187087dbe72c2c75e480d4b695f5c67c8fa950a139

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec9c4b467fa985cd5db0ddacd422d2905182e1c0f0dc0958bd5e72d5aa14acd0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2018-07-06T05:40:17Z",
    "title_canon_sha256": "b36e4eb776e6ce0c0b1f3d568a1eb36ac2f9f6b24879a117bb1f080619acca14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.02260",
    "kind": "arxiv",
    "version": 1
  }
}