Pith Number

pith:BGZ6TN5Y

pith:2004:BGZ6TN5YZWTP6T67RNZV4QA26W

not attested not anchored not stored refs pending

The homotopy classes of continuous maps between some non-metrizable manifolds

Mathieu Baillif

arxiv:math/0403495 v1 · 2004-03-29 · math.GN · 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{BGZ6TN5YZWTP6T67RNZV4QA26W}

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	2026-05-18T04:01:51.514654Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09b3e9b7b8cda6ff4fdf8b735e401af58ef35927ca950efd9c9938bc9293f759

Aliases

arxiv: math/0403495 · arxiv_version: math/0403495v1 · doi: 10.48550/arxiv.math/0403495 · pith_short_12: BGZ6TN5YZWTP · pith_short_16: BGZ6TN5YZWTP6T67 · pith_short_8: BGZ6TN5Y

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/BGZ6TN5YZWTP6T67RNZV4QA26W \
  | 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: 09b3e9b7b8cda6ff4fdf8b735e401af58ef35927ca950efd9c9938bc9293f759

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d79abdbd3780d4ef57cf40d406a5afe0062148e6eb5cbc19228b5d7713486013",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "",
    "primary_cat": "math.GN",
    "submitted_at": "2004-03-29T15:28:36Z",
    "title_canon_sha256": "f246b64ac7a3d669e27a39d46af8a415786707ef9dcb50abe2e90a43808c4bc6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0403495",
    "kind": "arxiv",
    "version": 1
  }
}