Pith Number

pith:HA67SXAK

pith:2008:HA67SXAK6IHLIXK6LKGX72M2NF

not attested not anchored not stored refs pending

Convenient Categories of Smooth Spaces

Alexander E. Hoffnung, John C. Baez

arxiv:0807.1704 v4 · 2008-07-10 · math.DG · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HA67SXAK6IHLIXK6LKGX72M2NF}

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	2026-05-18T00:37:49.226985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

383df95c0af20eb45d5e5a8d7fe99a69436ea4a9da5e6a327a3e5ddcf8a19bba

Aliases

arxiv: 0807.1704 · arxiv_version: 0807.1704v4 · doi: 10.48550/arxiv.0807.1704 · pith_short_12: HA67SXAK6IHL · pith_short_16: HA67SXAK6IHLIXK6 · pith_short_8: HA67SXAK

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/HA67SXAK6IHLIXK6LKGX72M2NF \
  | 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: 383df95c0af20eb45d5e5a8d7fe99a69436ea4a9da5e6a327a3e5ddcf8a19bba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "141d833b57de1c0852e5fe2365c045fd10feb0a3719529b01d5132341b8a5b14",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-07-10T17:30:54Z",
    "title_canon_sha256": "e77e9b5db49ee651a0aed900c79ca97eb21caf1c81b3ad4b8885c7c945579ceb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.1704",
    "kind": "arxiv",
    "version": 4
  }
}