Pith Number

pith:SDIXVXZD

pith:2004:SDIXVXZDEWIKCIOT3JQJNDCJTR

not attested not anchored not stored refs pending

Secondary Characteristic Classes of Surface Bundles

Soren Galatius

arxiv:math/0402226 v1 · 2004-02-13 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SDIXVXZDEWIKCIOT3JQJNDCJTR}

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	2026-05-18T02:41:32.510715Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90d17adf232590a121d3da60968c499c63a6345756393daf2bd486b42a817d23

Aliases

arxiv: math/0402226 · arxiv_version: math/0402226v1 · doi: 10.48550/arxiv.math/0402226 · pith_short_12: SDIXVXZDEWIK · pith_short_16: SDIXVXZDEWIKCIOT · pith_short_8: SDIXVXZD

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/SDIXVXZDEWIKCIOT3JQJNDCJTR \
  | 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: 90d17adf232590a121d3da60968c499c63a6345756393daf2bd486b42a817d23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82267d37174e052c2a4331eb3e5886a9e9a39446889d6b852c4b28aefe5e1bcc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2004-02-13T14:02:42Z",
    "title_canon_sha256": "d568daad15bada18b550809a87d83b188f4cad3006650a7cc96f9dd77648b1e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0402226",
    "kind": "arxiv",
    "version": 1
  }
}